:
k - rbinom(N,1,p)
m - rbinom(k,1,q)
Regards,
Moshe.
--- sigalit mangut-leiba [EMAIL PROTECTED] wrote:
Hi,
The probability of false detection is: P(T+ |
D-)=1-P(T+ | D+)=0.05.
and I want to find the joint probability
P(T+,D+)=P(T+|D+)*P(D+)
Thank you for your reply,
Sigalit
+ =
d) for all the combinations of t and d (for ICU and
Reg.)?
Is the probability of false detection (when there is
no disease) always 0?
Regards,
Moshe.
--- sigalit mangut-leiba [EMAIL PROTECTED] wrote:
hello,
I asked about this simulation a few days ago, but
still i can't get what i
hello,
I asked about this simulation a few days ago, but still i can't get what i
need.
I have 2 units: icu and regular. from icu I want to take 200 observations
from binomial distribution, when probability for disease is: p=0.6.
from regular I want to take 300 observation with the same
hello,
i want to do a binomial simulation, by taking 200 var. from one group (x)
and 300 from another (y).
the prob. for disease=.6 in both groups.
x - rbinom(200, 1, .6)
y - rbinom(300, 1, .6)
if the person is from group x - the probability to find the disease,
assuming the person is sick, is
has the
disease is calculated as follows:
Pr(T+ | D+)=(Pr(D+ | T+)*Pr(T+))/Pr(D+)
is that what you mean?
Kyle H. Ambert
Department of Behavioral Neuroscience
Oregon Health Science University
On 8/8/07, sigalit mangut-leiba [EMAIL PROTECTED] wrote:
hello,
i want to do
Intermountain Healthcare
[EMAIL PROTECTED]
(801) 408-8111
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
sigalit mangut-leiba
Sent: Wednesday, August 08, 2007 11:18 AM
To: r-help
Subject: Re: [R] simulation-binomial
I have the probability: P(T
Hi all,
i'm trying to run a two-sample t-test.
i have a longitudinal data that looks like this:
idnageclass
1 22 1
1 22 1
1 22 1
1 22 1
2 63 3
2 63 3
2 63 3
3 43 2
3 43 2
3 43
hello,
i want to compute the mean of a variable (aps) for every class
(1,2, and 3).
every id have a few obs., aps and class are constant over id.
like this:
id aps class
1 11 2
1 11 2
1 11 2
1 11 2
1 11 2
2 83
2 8
I'm sorry for the unfocused questions, i'm new here...
the output should be:
classaps_mean
1 na
2 11.5
3 8
the mean aps of every class, when every id count *once*, for example: class
2, mean= (11+12)/2=11.5
hope it's clearer.
sigalit.
thank you!
sigalit.
-- Forwarded message --
From: sigalit mangut-leiba [EMAIL PROTECTED]
Date: Jul 19, 2007 7:03 PM
Subject: tapply
To: r-help r-help@stat.math.ethz.ch
I'm sorry for the unfocused questions, i'm new here...
the output should be:
classaps_mean
1
hello,
I have a longitudinal data:
idn mort30 newinfec
1 0 1
1 0 1
1 0 1
1 0 1
2 1 1
2 1 1
2 1 1
3 0
Hello all,
I want to use the table function, but for every id I have a different no.
of rows (obs.).
If I write:
table(x$class, x$infec)
I don't get the right frequencies because I should count every id once, if
id 1 has 20 observations It should count as one.
can I use unique func.
Hello all,
I want to use the table function, but for every id I have a different no.
of rows (obs.).
If I write:
table(x$class, x$infec)
I don't get the right frequencies because I should count every id once, if
id 1 has 20 observations It should count as one.
can I use unique func. here?
Hello all,
I want to analyze data that looks like this:
Id var1 var2 var3..
1 0 1 0
1 0 1 1
2
2
2
2
Not all id's have the same no. of observations.
At the first stage I want to count how many people in the survey, how many
have 1 in var1, etc.
How
14 matches
Mail list logo
