Re: Applied analysis question

On 28 Feb 2002 07:37:16 -0800, [EMAIL PROTECTED] (Brad Anderson) wrote: > Rich Ulrich <[EMAIL PROTECTED]> wrote in message >news:<[EMAIL PROTECTED]>... > > On 27 Feb 2002 11:59:53 -0800, [EMAIL PROTECTED] (Brad Anderson) > > wrote: BA > > > > > > I have a continuous response variable that range

Re: Applied analysis question

s > the data [ snip, rest] Looks to me like it might be reasonable to re-sort and re-score the speed as reciprocal, "questions per hour" -- instead of the original, hours per question. That emphasizes something you (perhaps) omitted: some tests at the end were incomplete. Also, Q/H

Re: Applied analysis question

[EMAIL PROTECTED] (Eric Bohlman) wrote in message news:... > Rolf Dalin <[EMAIL PROTECTED]> wrote: > > IIRC, your example is exactly the sort of situation for which Tobit > modelling was invented. Considered that (actually estimated a couple of Tobit models and if I use a log transformed or bo

Re: Applied analysis question

Rolf Dalin <[EMAIL PROTECTED]> wrote: > Brad Anderson wrote: >> I have a continuous response variable that ranges from 0 to 750. I only >> have 90 observations and 26 are at the lower limit of 0, > What if you treated the information collected by that variable as really > two variables, one ca

Re: Applied analysis question

els do make sense. > well, if 750 has the same numerical sort of meaning as 0 (unit wise) ... in > terms of what is being measured then i would personally not think so SINCE, > the categories above 0 will encompass very wide ranges of possible values [ ... ] Frankly, the question is ab

Re: Applied analysis question

At 07:37 AM 2/28/02 -0800, Brad Anderson wrote: >I think a lot of folks just run standard analyses or arbitrarily apply >some "normalizing" transformation because that's whats done in their >field. Then report the results without really examining the >underlying distributions. I'm curious how f

Re: Applied analysis question

Rich Ulrich <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > On 27 Feb 2002 11:59:53 -0800, [EMAIL PROTECTED] (Brad Anderson) > wrote: > > > I have a continuous response variable that ranges from 0 to 750. I > > only have 90 observations and 26 are at the lower limit of 0, whi

Re: Applied analysis question

Brad Anderson wrote: > I have a continuous response variable that ranges from 0 to 750. I only > have 90 observations and 26 are at the lower limit of 0, What if you treated the information collected by that variable as really two variables, one categorical variable indicating zero or non-zero

Re: Applied analysis question

i thought of a related data situation ...but at the opposite end what if you were interested in the relationship between the time it takes students to take a test AND their test score so, you have maybe 35 students in your 1 hour class that starts at 9AM ... you decide to note (by your watch) t

Re: Applied analysis question

Brad Anderson wrote: > > I have a continuous response variable that ranges from 0 to 750. I > only have 90 observations and 26 are at the lower limit of 0, which is > the modal category. If it's continuous, it can't really have categories (apart from those induced by recording the variable to

Re: Applied analysis question

At 04:11 PM 2/27/02 -0500, Rich Ulrich wrote: >Categorizing the values into a few categories labeled, >"none, almost none, " is one way to convert your scores. >If those labels do make sense. well, if 750 has the same numerical sort of meaning as 0 (unit wise) ... in terms of what is being

Re: Applied analysis question

On 27 Feb 2002 11:59:53 -0800, [EMAIL PROTECTED] (Brad Anderson) wrote: > I have a continuous response variable that ranges from 0 to 750. I > only have 90 observations and 26 are at the lower limit of 0, which is > the modal category. The mean is about 60 and the median is 3; the > distributio

Applied analysis question

I have a continuous response variable that ranges from 0 to 750. I only have 90 observations and 26 are at the lower limit of 0, which is the modal category. The mean is about 60 and the median is 3; the distribution is highly skewed, extremely kurtotic, etc. Obviously, none of the power transf

Re: Question on Conditional PDF

"Glen Barnett" <[EMAIL PROTECTED]> wrote in message a5dev7$8jn$[EMAIL PROTECTED]">news:a5dev7$8jn$[EMAIL PROTECTED]... > > Chia C Chong <[EMAIL PROTECTED]> wrote in message > a5d38d$63e$[EMAIL PROTECTED]">news:a5d38d$63e$[EMAIL PROTECTED]... > > > > > > "Glen" <[EMAIL PROTECTED]> wrote in message

Re: Question on Conditional PDF

> > > Do you want to make any assumptions about the form of the conditional, > > > or the joint, or any of the marginals? > > > > Well, the X & Y are dependent and hence there are being descibed by a joint > > PDF. > > Can you at least indicate whether any of them are restricted to be positive?

Re: Question on Conditional PDF

Chia C Chong <[EMAIL PROTECTED]> wrote in message a5d38d$63e$[EMAIL PROTECTED]">news:a5d38d$63e$[EMAIL PROTECTED]... > > > "Glen" <[EMAIL PROTECTED]> wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > Do you want to make any assumptions about the form of the conditional, > > or t

Re: Question on Conditional PDF

"Glen" <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > [EMAIL PROTECTED] (Chia C Chong) wrote in message news:<[EMAIL PROTECTED]>... > > Helloo.. > > > > I have 1000 samples 3 RVs (say X, Y and Z) drawn from a series of > > experiments. My intention is to find

Re: Question on Conditional PDF

[EMAIL PROTECTED] (Chia C Chong) wrote in message news:<[EMAIL PROTECTED]>... > Helloo.. > > I have 1000 samples 3 RVs (say X, Y and Z) drawn from a series of > experiments. My intention is to find the PDF of Z condition on X and Y > i.e. f(Z|X,Y). I am not sure what is the proper way of doing i

Re: Question on Conditional PDF

if you don't want to make to many assumptions then you can try nonparametric estimation (estimate f(X,Y,Z) and f(X,Y) by kernel methods). Check out books on nonparametric methods ("Nonparametric Econometrics" by Pagan, for example, or a book by Silverman(?)). On 24 Feb 2002, Chia C Chong wrote:

Question on Conditional PDF

Helloo.. I have 1000 samples 3 RVs (say X, Y and Z) drawn from a series of experiments. My intention is to find the PDF of Z condition on X and Y i.e. f(Z|X,Y). I am not sure what is the proper way of doing it practically!!. Any suggestions?? Thanks in advacnce Regards, CCC ==

Re: Question on CDF

Henry <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > I was trying to suggest that he meant the slope of the CDF was the > height of the PDF. Oh, okay. Yes, that would be correct, but it shouldn't be called probability! Glen ===

Re: Question on CDF

On Sat, 23 Feb 2002 00:27:00 +1100, "Glen Barnett" <[EMAIL PROTECTED]> wrote: > >Henry <[EMAIL PROTECTED]> wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... >> On Fri, 22 Feb 2002 08:55:42 +1100, "Glen Barnett" >> <[EMAIL PROTECTED]> wrote: >> >> >Bob <[EMAIL PROTECTED]> wrote in mes

Re: Question on CDF

Henry <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > On Fri, 22 Feb 2002 08:55:42 +1100, "Glen Barnett" > <[EMAIL PROTECTED]> wrote: > > >Bob <[EMAIL PROTECTED]> wrote in message > >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > >> A straight line CDF would im

Re: Question on CDF

On Fri, 22 Feb 2002 08:55:42 +1100, "Glen Barnett" <[EMAIL PROTECTED]> wrote: >Bob <[EMAIL PROTECTED]> wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... >> A straight line CDF would imply the data is uniformly distributed, >> that is, the probability of one event is the same as the p

Re: Question on CDF

[EMAIL PROTECTED] (Linda) wrote in message news:<[EMAIL PROTECTED]>... > Hi! > > If I plot CDF of a sample data and this CDF looks like a straight line > cross through 0. What does this implies?? Normally, CDF will not look > like a straight line but sth like a "S2 shape, isn't?? > > Linda A s

Re: Question on CDF

Bob <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > [EMAIL PROTECTED] (Linda) wrote in message news:<[EMAIL PROTECTED]>... > > Hi! > > > > If I plot CDF of a sample data and this CDF looks like a straight line > > cross through 0. What does this implies?? Norma

Question on CDF

Hi! If I plot CDF of a sample data and this CDF looks like a straight line cross through 0. What does this implies?? Normally, CDF will not look like a straight line but sth like a "S2 shape, isn't?? Linda = Instructions for joini

Re: Question on random number generator

Herman Rubin wrote: > > > ExpVar = -ln(UnifVar); > > It is not a good method in the tails, and is much too slow. If I recall correctly, transcendental operations on a Pentium require only a couple hundred clock cycles and can usually be optimized to take place during other calc

Re: Question on random number generator

In article <[EMAIL PROTECTED]>, Robert J. MacG. Dawson <[EMAIL PROTECTED]> wrote: >Linda wrote: >> I want to generate a series of random variables, X with exponential >> PDF with a given mean,MU value. However, I only want X to be in some >> specified lower and upper limit?? Say between 0 -> 15

Re: Question on random number generator

Alan Miller wrote (six times): > > Linda wrote in message <[EMAIL PROTECTED]>... > >I want to generate a series of random variables, X with exponential > >PDF with a given mean,MU value. However, I only want X to be in some > >specified lower and upper limit?? Say between 0 -> 150 i.e. rejected

Re: Question on random number generator

Linda wrote: > > I want to generate a series of random variables, X with exponential > PDF with a given mean,MU value. However, I only want X to be in some > specified lower and upper limit?? Say between 0 -> 150 i.e. rejected > anything outside this range Does anyone have any ideas how should

Re: Newbie question

AP wrote: > > Hi all: > > I would appreciate your help in solving this question. > > calculate the standard deviation of a sample where the mean and > standard deviation from the process are provided? > E.g. Process mean = 150; standard deviation = 20. What is the

Re: Newbie question

On 15 Feb 2002 14:38:49 -0800, [EMAIL PROTECTED] (AP) wrote: > Hi all: > > I would appreciate your help in solving this question. > > calculate the standard deviation of a sample where the mean and > standard deviation from the process are provided? > E.g. Process

Re: Question on random number generator

Thanks everyone for helping me... Regards, Linda Art Kendall <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > try this SPSS syntax. > > new file. > * this program generates 200 cases > * trims those outside the desired range > * and takes the first 100 of the remaining. > *

Re: Question on random number generator

try this SPSS syntax. new file. * this program generates 200 cases * trims those outside the desired range * and takes the first 100 of the remaining. * change lines flagged with < . input program. loop #i = 1 to 200. /* < . compute mu= .005. /* < . compute x = rv.exp(mu). end case.

Re: Question on random number generator

Linda wrote in message <[EMAIL PROTECTED]>... >I want to generate a series of random variables, X with exponential >PDF with a given mean,MU value. However, I only want X to be in some >specified lower and upper limit?? Say between 0 -> 150 i.e. rejected >anything outside this range Does anyone ha

Re: Question on random number generator

Linda wrote in message <[EMAIL PROTECTED]>... >I want to generate a series of random variables, X with exponential >PDF with a given mean,MU value. However, I only want X to be in some >specified lower and upper limit?? Say between 0 -> 150 i.e. rejected >anything outside this range Does anyone ha

Re: Question on random number generator

Linda wrote in message <[EMAIL PROTECTED]>... >I want to generate a series of random variables, X with exponential >PDF with a given mean,MU value. However, I only want X to be in some >specified lower and upper limit?? Say between 0 -> 150 i.e. rejected >anything outside this range Does anyone ha

Re: Question on random number generator

Linda wrote in message <[EMAIL PROTECTED]>... >I want to generate a series of random variables, X with exponential >PDF with a given mean,MU value. However, I only want X to be in some >specified lower and upper limit?? Say between 0 -> 150 i.e. rejected >anything outside this range Does anyone ha

Re: Question on random number generator

Linda wrote in message <[EMAIL PROTECTED]>... >I want to generate a series of random variables, X with exponential >PDF with a given mean,MU value. However, I only want X to be in some >specified lower and upper limit?? Say between 0 -> 150 i.e. rejected >anything outside this range Does anyone ha

Re: Question on random number generator

Linda wrote in message <[EMAIL PROTECTED]>... >I want to generate a series of random variables, X with exponential >PDF with a given mean,MU value. However, I only want X to be in some >specified lower and upper limit?? Say between 0 -> 150 i.e. rejected >anything outside this range Does anyone ha

Re: Question on random number generator

In article <[EMAIL PROTECTED]>, Bill Rowe <[EMAIL PROTECTED]> wrote: >In article <[EMAIL PROTECTED]>, > [EMAIL PROTECTED] (Linda) wrote: >>I want to generate a series of random variables, X with exponential >>PDF with a given mean,MU value. However, I only want X to be in some >>specified lower

Re: Question on random number generator

Hi, Define Y = X if X<=T = 0 otherwise For your problem, T=150 (threshold) and X is exponential random variable with mean, MU. So, first generate X and compare with T and assign a value to Y as specified in the above rule. Alternatively, find the CDF (distribution funct

Re: Question on random number generator

Linda wrote in message <[EMAIL PROTECTED]>... >I want to generate a series of random variables, X with exponential >PDF with a given mean,MU value. However, I only want X to be in some >specified lower and upper limit?? Say between 0 -> 150 i.e. rejected >anything outside this range Does anyone ha

Re: Question on random number generator

In article <[EMAIL PROTECTED]>, [EMAIL PROTECTED] (Linda) wrote: >I want to generate a series of random variables, X with exponential >PDF with a given mean,MU value. However, I only want X to be in some >specified lower and upper limit?? Say between 0 -> 150 i.e. rejected >anything outside this

Question on random number generator

I want to generate a series of random variables, X with exponential PDF with a given mean,MU value. However, I only want X to be in some specified lower and upper limit?? Say between 0 -> 150 i.e. rejected anything outside this range Does anyone have any ideas how should I do that?? Regards, Lind

Newbie question

Hi all: I would appreciate your help in solving this question. calculate the standard deviation of a sample where the mean and standard deviation from the process are provided? E.g. Process mean = 150; standard deviation = 20. What is the SD for a sample of 25? The answer suggested is 4.0

Re: one-way ANOVA question

On 13 Feb 2002 09:48:41 -0800, [EMAIL PROTECTED] (Dennis Roberts) wrote: > At 09:21 AM 2/13/02 -0600, Mike Granaas wrote: > >On Fri, 8 Feb 2002, Thomas Souers wrote: > > > > > > 2) Secondly, are contrasts used primarily as planned comparisons? If > > so, why? > > > > > > >I would second those wh

Re: one-way ANOVA question

At 09:21 AM 2/13/02 -0600, Mike Granaas wrote: >On Fri, 8 Feb 2002, Thomas Souers wrote: > > > > 2) Secondly, are contrasts used primarily as planned comparisons? If > so, why? > > > >I would second those who've already indicated that planned comparisons are >superior in answering theoretical que

Re: one-way ANOVA question

means. Here we have a type I error rate of >alpha. If the global F test is significant, we then perform a series of t-tests >(pairwise comparisons of factor level means), each at a type I error rate of alpha. >This may seem like a stupid question, but how does this test preserve a type I er

Re: one-way ANOVA question

On Fri, 8 Feb 2002, Thomas Souers wrote: > > 2) Secondly, are contrasts used primarily as planned comparisons? If so, why? > I would second those who've already indicated that planned comparisons are superior in answering theoretical questions and add a couple of comments: 1) an omnibus test

Re: one-way ANOVA question

Hi On 8 Feb 2002, Thomas Souers wrote: > 2) Secondly, are contrasts used primarily as planned > comparisons? If so, why? There are a great many possible contrasts even with a relatively small number of means. If you examine the data and then decide what contrasts to do, then you have in some i

Re: one-way ANOVA question

At 10:37 AM 2/8/02 -0800, Thomas Souers wrote: >2) Secondly, are contrasts used primarily as planned comparisons? If so, why? well, in the typical rather complex study ... all pairs of possible mean differences (as one example) are NOT equally important to the testing of your theory or notions

Re: one-way ANOVA question

to test the hypothesis of equality of factor level means. Here we have a type I error rate of alpha. If the global F test is significant, we then perform a series of t-tests (pairwise comparisons of factor level means), each at a type I error rate of alpha. This may seem like a stupid question, but how

one-way ANOVA question

ha. If the global F test is significant, we then perform a series of t-tests (pairwise comparisons of factor level means), each at a type I error rate of alpha. This may seem like a stupid question, but how does this test preserve a type I error for the entire experiment? I understand that with a Bonfe

Question on Poisson -- Multinomial Relationship

Hi all, The conditional distribution of Poisson variates given their sum is multinomial. Does anyone know the densitity of Poisson variates, given their partial sums S1, S2, etc. Sk, with each Si possibly overlapping with one or more of the other sums? Thanks in advance. Bhaskara ===

(Probably Simple) Chi-Square Intuition Question

I'm looking at forced-reponse answers to a question where there a several possible choices. I'm trying to test the significance of the difference between the proportion choosing answer A and the proportion choosing answer B. I've got the fairly-simple formula for a chi-square-d

Re: cell-counts question

an average of 0.0094 inches. I believe European locomotive (train engine) plans are documented in mm, from one end to the other. But the overall length is reported to management and the public in meters. Does this help? Jay Wei Wang wrote: > Dear Friends, > > Here is an exam question whi

cell-counts question

Dear Friends, Here is an exam question which I don't know how to do. Can anyone help me? The question is "a biostatistician was asked to analyze some data regarding cell counts, and the values were reported like 6.27x10^7, 72.5x10^7, 3.42x10^7, etc. rather than using the data

Re: SAT Question Selection

t;[EMAIL PROTECTED]> wrote in sci.stat.edu: > >Back in my day (did we have days back then?) I recall > >talk of test questions on the SAT. That is, these questions > >were not counted; they were being tested for (I presume) > >some sort of statistical validity. > > >

Re: SAT Question Selection

esume) >some sort of statistical validity. > >Does anyone have any statistical insight into the SAT question >selection process. Does anyone have a specific lead? I can >find virtually nothing. I remember reading a good book about the inner operation of ETS (administers the SA

Re: SAT Question Selection

tistical validity. > > Does anyone have any statistical insight into the SAT question > selection process. Does anyone have a specific lead? I can > find virtually nothing. I believe that they have to change their questions a lot more often than they used to, now that they occasionally

SAT Question Selection

Back in my day (did we have days back then?) I recall talk of test questions on the SAT. That is, these questions were not counted; they were being tested for (I presume) some sort of statistical validity. Does anyone have any statistical insight into the SAT question selection process. Does

Re: Sorry for question, but how is the english word for @

at "Nathaniel" <[EMAIL PROTECTED]> wrote in message news:9v3d79$2rj$[EMAIL PROTECTED]... > Hi, > > Sorry for question, but how is the english word for @ > Pleas forgive me. > > N. > > = I

Re: Question on 2-D joint distribution...

In article , Chia C Chong <[EMAIL PROTECTED]> wrote: >Hi! >I have a series of observations of 2 random variables (say X and Y) from my >measurement data. These 2 RVs are not independent and hence f(X,Y) ~= >f(X)f(Y). Hence, I can't investigate f(X) and f(Y) separatel

Re: Question on 2-D joint distribution...

Chia C Chong <[EMAIL PROTECTED]> wrote in message a145qk$qfq$[EMAIL PROTECTED]">news:a145qk$qfq$[EMAIL PROTECTED]... > Hi! > > I have a series of observations of 2 random variables (say X and Y) from my > measurement data. These 2 RVs are not independent and hence f(X,Y) ~= > f(X)f(Y). Hence, I c

Re: Question on 2-D joint distribution...

"Chia C Chong" <[EMAIL PROTECTED]> wrote in message a145qk$qfq$[EMAIL PROTECTED]">news:a145qk$qfq$[EMAIL PROTECTED]... > Hi! > > I have a series of observations of 2 random variables (say X and Y) from my > measurement data. These 2 RVs are not independent and hence f(X,Y) ~= > f(X)f(Y). Hence, I

Question on 2-D joint distribution...

Hi! I have a series of observations of 2 random variables (say X and Y) from my measurement data. These 2 RVs are not independent and hence f(X,Y) ~= f(X)f(Y). Hence, I can't investigate f(X) and f(Y) separately. I tried to plot the 2-D kernel density estimates of these 2 RVs and from the it look

Re: Measure of Association Question.

[EMAIL PROTECTED] (Petrus Nel) wrote in message news:<000201c18fe2$f73aeee0$ed9e22c4@oemcomputer>... > I require some advice regarding the following: One set of variables is > the grades obtained by students for different high school subjects (i.e. > the symbols candidates obtained such as A,

Re: Measure of Association Question.

Good advice on all counts. I'm curious about where you want to take this 'correlation' if found. A college admissions person could use the relationship (in the form of a regression equation), if any, to predict the score on the 'college level subject' for those students who were unable to take s

Re: Measure of Association Question.

On Fri, 28 Dec 2001, Petrus Nel wrote: > I require some advice regarding the following: One set of variables is > the grades obtained by students for different high school subjects > (i.e. the symbols candidates obtained such as A, B, C, D, etc. for each > subject). The other set of variables

Measure of Association Question.

Dear members,   I require some advice regarding the following: One set of variables is the grades obtained by students for different high school subjects (i.e. the symbols candidates obtained such as A, B, C, D, etc. for each subject). The other set of variables are the scores obtained for

Re: Maximum Likelihood Question

. The only constrain on my parameters is that they remain positive. Occassionally one will approach zero, not often. I am reposting because I have another focused question stemming from the same problem. MY SITUATION: I am studying a time-dependent stochastic Markov process. The conventional method

Re: Maximum Likelihood Question

"Herman Rubin" <[EMAIL PROTECTED]> wrote in message 9vqoln$[EMAIL PROTECTED]">news:9vqoln$[EMAIL PROTECTED]... > > Maximum likelihood is ASYMPTOTICALLY optimal in LARGE > samples. It may not be good for small samples; it pays > to look at how the actual likelihood function behaves. > The fit is

Re: Maximum Likelihood Question

In article <[EMAIL PROTECTED]>, Jimc10 <[EMAIL PROTECTED]> wrote: >To all who have helped me on the previous thread thank you very much. I am >reposting this beause the question has become more focused. >I am studying a stochastic Markov process and using a maximum likelih

Maximum Likelihood Question

To all who have helped me on the previous thread thank you very much. I am reposting this beause the question has become more focused. I am studying a stochastic Markov process and using a maximum likelihood technique to fit observed data to theoretical models. As a first step I am using a Monte

Re: Sorry for question, but how is the english word for @

U¿ytkownik "Nathaniel" <[EMAIL PROTECTED]> napisa³ w wiadomo¶ci news:9v3d79$2rj$[EMAIL PROTECTED]... > Hi, > > Sorry for question, but how is the english word for @ > Pleas forgive me. > > N. Thank everyone fo

Re: Sorry for question, but how is the english word for @

Nathaniel: The symbol @ belongs to the cateqory of special characters in English.   Although it is often rendered as "commercial at" in a technical context, in the vernacular (and on the net)  it is most often rendered as simply"at." I can't help but advise that, since English is clearly your se

Re: Sorry for question, but how is the english word for @

ype). Sometimes addresses were given as > john.smith at harvard.edu > Nathaniel wrote: > > > Hi, > > > > Sorry for question, but how is the english word for @ > > Pleas forgive me. > > > > N. > ===

Re: Sorry for question, but how is the english word for @

Nathaniel wrote: > > Hi, > > Sorry for question, but how is the english word for @ > Pleas forgive me. You're forgiven... The New Hacker's Dictionary gives: common: at sign; at; strudel rare (and often facetious): vortex, whorl, whirlp

RE: Question about concatenating probability distributions

RE: The Poisson process and Lognormal action time. This kind of problem arises a lot in the actuarial literature (a process for the number of claims and a process for the claim size), and the Poisson and the lognormal have been used in this context - it might be worth your while to look there fo

Re: Sorry for question, but how is the english word for @

ken as point as in filname point ext (extension indicating type). Sometimes addresses were given as john.smith at harvard.edu Nathaniel wrote: > Hi, > > Sorry for question, but how is the english word for @ &

Re: Sorry for question, but how is the english word for @

wrote: >Hi, > >Sorry for question, but how is the english word for @ >Pleas forgive me. > >N. > > = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =

Re: Question about concatenating probability distributions

v) * (v^n)/(n!) > > Each arriving customer has a task to be carried out of which the size (in > units) is described by a lognormal distribution: > > f(u)= exp(-(ln u)^2 / (2*a^2)) / (u*a*SQRT(2*PI)) > > Question: What is the total number of units (i.e. size of all tasks) > req

Re: Question about concatenating probability distributions

e carried out of which the size (in > units) is described by a lognormal distribution: > > f(u)= exp(-(ln u)^2 / (2*a^2)) / (u*a*SQRT(2*PI)) > > Question: What is the total number of units (i.e. size of all tasks) > requested during the time intervall ? > > I wonder how the

Question about concatenating probability distributions

(u)= exp(-(ln u)^2 / (2*a^2)) / (u*a*SQRT(2*PI)) Question: What is the total number of units (i.e. size of all tasks) requested during the time intervall ? I wonder how these distributions can be concatenated, and if there is a formula for this. Thanks for any help! Jacek Gomoluch

Re: Stat question

the reality of this is ... sometimes getting notes from other students is helpful ... sometimes it is not ... there is no generalization one can make about this most student who NEED notes are not likely to ask people other than their friends ... and, in doing so, probably know which of their

Re: Stat question

Jon Miller <[EMAIL PROTECTED]> wrote in message > > You can ask the top students to look at their notes, but you should be prepared > to find that their notes are highly idiosyncratic. Maybe even unusable. Having seen notes of some top students on a variety of occasions (as a student and as a l

Re: Stat question

Stan Brown wrote: > Jon Miller <[EMAIL PROTECTED]> wrote in sci.stat.edu: > > > >Stan Brown wrote: > > > >> I would respectfully suggest that the OP _first_ carefully study the > >> textbook sections that correspond to the missed lectures, get notes from > >> a classmate > > > >This part is of do

Re: probability question

It's true. If you are concerned with proof, following the this belove according to conditional probability p(a|b)=p(a,b)/p(b) (1) P(A,B|C)=P(A,B,C)/P(C) (2) P(A,B,C)=P(A,C)*P(B|A,C) (3) P(A,C)=P(C)*P(A|C) WITH (2) AND (3) WE GET (4) P(A,B,C)=P(C)*P(A|C)*P(B|A,C) TAKING (1) AND (4) WE GET P(A*

Re: probability question

Il s'agit d'un message multivolet au format MIME. --F4F503AE2A9C358CB6A37D62 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Hi, This assertion is true Franck Matt Dobrin a écrit : > Does P(A*B|C)=P(A|C)*P(B|A*C)? If not, what does it equal? Thanks in

Re: probability question

Il s'agit d'un message multivolet au format MIME. --982FBF2E2FA5C1B960626D56 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Hi, This assertion is true Franck Matt Dobrin a écrit : > Does P(A*B|C)=P(A|C)*P(B|A*C)? If not, what does it equal? Thanks in

Re: simple Splus question - plot regression function

Alexander Sirotkin wrote: > > Hi. > > After fitting a linear regression model I need to do an extremely > simple thing - plot the regression function along with the original > data. Splus has a simple way to plot quite a few complex plots and > a very complicated way to do this simple one ! > >

probability question

Does P(A*B|C)=P(A|C)*P(B|A*C)? If not, what does it equal? Thanks in advance. -Matt = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http

simple Splus question - plot regression function

Hi. After fitting a linear regression model I need to do an extremely simple thing - plot the regression function along with the original data. Splus has a simple way to plot quite a few complex plots and a very complicated way to do this simple one ! Is there a simple way to plot the regress

Re: Stat question

At 06:13 PM 12/1/01 -0500, Stan Brown wrote: >Jon Miller <[EMAIL PROTECTED]> wrote in sci.stat.edu: > > > >Stan Brown wrote: > > > >> I would respectfully suggest that the OP _first_ carefully study the > >> textbook sections that correspond to the missed lectures, get notes from > >> a classmate

Re: Stat question

Jon Miller <[EMAIL PROTECTED]> wrote in sci.stat.edu: > >Stan Brown wrote: > >> I would respectfully suggest that the OP _first_ carefully study the >> textbook sections that correspond to the missed lectures, get notes from >> a classmate > >This part is of doubtful usefulness. Doubtful? It is "

Re: Stat question

Stan Brown wrote: > I would respectfully suggest that the OP _first_ carefully study the > textbook sections that correspond to the missed lectures, get notes from > a classmate This part is of doubtful usefulness. > , and _then_ contact the instructor to fill in any remaining gaps or > answer

Re: Stat question

Elliot Cramer <[EMAIL PROTECTED]> wrote in sci.stat.edu: >Sima <[EMAIL PROTECTED]> wrote: >: I have missed some lectures on statistics due to heavy illness >: and now i got an assignment which i cannot solve. > >We all feel sorry for you Sima, but perhaps you should talk to your >instructor about

Re: Stat question

Sima <[EMAIL PROTECTED]> wrote: : Dear List Members, : I have missed some lectures on statistics due to heavy illness : and now i got an assignment which i cannot solve. We all feel sorry for you Sima, but perhaps you should talk to your instructor about it. He undoubtedly has office hours.

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