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 message [EMAIL P

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 probability

Re: Statistics/Probability

On 2 Feb 2002 20:41:12 -0800, [EMAIL PROTECTED] (Joe Dirt) wrote: is there somewhere i can go on the web to learn about things such as probability distributions (binomial/bernoulli trials, poisson, normal), statistical estimation (confidence intervals, etc), sampling distributions (t, chi-square,

Re: Mean free distance?

is surprisingly large. Neil Henry Virginia Commonwealth University osmium wrote: Visualize a large cubic room, say 100 feet on a side. 1,000 ping pong balls will be removed from an urn and placed in the room via random drawings from a uniform distribution for the x, y, and z position. The balls

RE: What Is This?: ????

I thought that these were sublime messages from Venus. I am receiving them too. Henry M. Silvert Ph.D. Research Statistician The Conference Board 845 3rd. Avenue New York, NY 10022 Tel. No.: (212) 339-0438 Fax No.: (212) 836-3825 -Original Message- From: Ronny Richardson

Re: Standardizing evaluation scores

forgotten most of the facts he acquired in school and university. Education is what survives when what has been learned has been forgotten. - B.F. Skinner New Scientist, 31 May 1964, p. 484 -- Neil W. Henry Department of Sociology and Anthropology Department of Statistical

RE: Important notice about Final Exam on Thursday

Do we all have to be privy to this? Henry M. Silvert Ph.D. Research Statistician The Conference Board 845 3rd. Avenue New York, NY 10022 Tel. No.: (212) 339-0438 Fax No.: (212) 836-3825 -Original Message- From: Dennis Leitner [SMTP:[EMAIL PROTECTED]] Sent: Wednesday, December 05

RE: Who said Correlation does not imply causation.

Might I go one step further and point out the correlation does not establish a causal relationship primarily because it does not point to directionality, at least not without a working hypothesis and some background support. Henry M. Silvert Ph.D. Research Statistician The Conference Board 845

RE: Presenting results of categorical data?

I would like to add that with this kind of data we use the median instead of the average. Henry M. Silvert Ph.D. Research Statistician The Conference Board 845 3rd. Avenue New York, NY 10022 Tel. No.: (212) 339-0438 Fax No.: (212) 836-3825 -Original Message- From: Donald Burrill [SMTP

RE: Ninety Percent above Median

very good! Henry M. Silvert Ph.D. Research Statistician The Conference Board 845 3rd. Avenue New York, NY 10022 Tel. No.: (212) 339-0438 Fax No.: (212) 836-3825 -Original Message- From: Esa M. Rantanen [SMTP:[EMAIL PROTECTED]] Sent: Monday, June 04, 2001 9:31 AM To: Glen Barnett

RE: additional variance explained (SPSS)

information each IV provides I think that you could perform a stepwise regression. Henry M. Silvert Ph.D. Research Statistician The Conference Board 845 3rd. Avenue New York, NY 10022 Tel. No.: (212) 339-0438 Fax No.: (212) 836-3825 -Original Message- From: Dianne Worth [SMTP:[EMAIL PROTECTED

Omissions in Journal Articles

to expect editors to be more sensitive to their readers' need to know exactly what is going on. -- ** `o^o' * Neil W. Henry ([EMAIL PROTECTED]) * -:- * Virginia Commonwealth University * _/ \_ * Richmond VA 23284

Re: multivariate normal with zero covariances?

On Fri, 13 Apr 2001 15:50:55 -0500, Charles Metz [EMAIL PROTECTED] wrote: snip This follows directly from the fact that uncorrelated *normal* random variables are independent (which can be proven by examining the form of the general multivariate normal density function when its covariance matrix

Re: Which distribution is this...

On 24 Dec 2000 08:04:17 -0500, [EMAIL PROTECTED] (Herman Rubin) wrote: If there is a simple form, it will involve using results from some version of number theory. The generating function of the total is (\prod_1^n (1+x^k) )/2^n. If the mean n(n+1)/2 is subtracted, the characteristic function

Re: (Quick) Sample observation

On Sat, 23 Dec 2000 15:47:13 GMT, [EMAIL PROTECTED] wrote: Just reading through some notes, and I was wondering what exactly is meant by the following sentence: Every sample observation x is the outcome of a random variable X which has an identical distribution (either discrete or continuous)

Re: Legal statistical flimflam

On Tue, 05 Dec 2000 22:51:22 GMT, Ron Hardin [EMAIL PROTECTED] wrote: ``Reasonable probability'' in ordinary use means something pretty near one. Not when I use it. I would say I would say if someone was "guilty beyond reasonable doubt" then that is equivalent to there not being a "reasonable

Re: NY Times on statisticians' view of election

or someone who could make such offensive comments. Rubin has the reputation of being a caustic jerk, but this really takes the cake. -- * `o^o' * Neil W. Henry ([EMAIL PROTECTED]) * -:- * Virginia Commonwealth University * _/ \_ * Richmond VA

Re: manual recount - of punched ballots

On Sun, 12 Nov 2000 23:45:39 GMT, Ron Hardin [EMAIL PROTECTED] wrote: Would you say that therefore a Republican county with the reversed numbers ought to be manually counted as well, if a Democratic one is? Otherwise it would seem a net Democratic gain is guaranteed. The county that hand counts

Tests of Statistical Significance

when looking at the interaction of two or more variables of a population as opposed to a sample of the population? Henry Flores Henry Flores, Ph.D. Professor Department of Political Science St. Mary's University San Antonio, TX 78228 (210) 431-2013 [EMAIL PROTECTED

FW: Message not deliverable

I think this message started with something I sent to one of the sci.stat newsgoups and then went to one of your lists. The txt attachment may be more useful than the message itself. -Original Message- From: [EMAIL PROTECTED] Sent: 29 June 2000 00:20 To: Henry Subject: Message

Re: multivariate statistics.

Any further advice you could give me would be a great help Thanks Claire Sent via Deja.com http://www.deja.com/ Before you buy. -- ***** `o^o' * Neil W. Henry ([EMAIL PROTECTED]) * -:- * Virginia Commonwealth University * _/ \_ * Ri

Re: Benford's law and simulation

On 12 May 2000 08:09:06 GMT, "DIAMOND Mark R" [EMAIL PROTECTED] wrote: Background: Theodore Hill showed, in a paper published in Statistical Science 1995, that if sequences of random variables $\{X\sb n\}$ are selected at random in a scale (base) unbiased way, then the mantissa distributions of

RE: Data Mining blooper and Related Subjects

constantly urged to use all my skills as a statistician and a research methodologist by "my managers." (Horrid!!!) Henry M. Silvert PHD Research Statistician The Conference Board 845 3rd. Avenue New York, NY 10022 Tel. No.: (212) 339-0438 Fax No.: (212) 836-3825 -Original Message- Fr

RE: Hypothesis testing and magic

Finally a voice of sanity!!! Henry M. Silvert Ph.D. Research Statistician The Conference Board 845 Third Ave. New York, NY 10022 Phone : (212)339-0438 Fax : (212)836-3825 Email : [EMAIL PROTECTED] -Original Message- From: Alan McLean [SMTP:[EMAIL PROTECTED]] Sent: Tuesday, April

Re: ** Stat question

On Sun, 06 Feb 2000 15:41:47 GMT, "Howard S. Hoffman" [EMAIL PROTECTED] wrote: (a) If you make a scatterplot of all possible values of U and V you will discover that for every value of U the mean value of V is 0. (b) In other words, the slope of the regression of U on V is zero. (c) This, for

Re: Prob. that mother has breast cancer given daughter has it

On Wed, 2 Feb 2000 23:53:39 +1100, "James" [EMAIL PROTECTED] wrote: Given a daughter has breast cancer, how to calculate the probability that her mother has breast cancer ? Suppose the probability that the mother has breast cancer is p1 if she carries a certain gene a, and p0 if she does not

Re: Scale Reliability

at chapter 9 of Dave Caplovitz's 1983 book "The Stages of Social Research" (and some of the references cited therein) for a classic discussion of how survey researchers view the issue of "Concepts and indices: the process of measurement". Neil Henry, Virginia Commonwealth Univ