Displaying 7 results from an estimated 7 matches for "tside".
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2003 May 30
1
power.t.test needs to check delta==NULL before abs(delta) (PR#3139)
...ch results in an
error.
--- rossini.power.t.test.R 2003-05-30 07:24:49.000000000 -0700
+++ rossini.power.t.test.R.~1~ 2003-05-30 08:47:09.000000000 -0700
@@ -10,7 +10,7 @@
alternative <- match.arg(alternative)
tsample <- switch(type, one.sample = 1, two.sample = 2, paired = 1)
tside <- switch(alternative, one.sided = 1, two.sided = 2)
- if (tside == 2 && !is.null(delta))
+ if (tside == 2)
delta <- abs(delta)
p.body <- quote({
nu <- (n - 1) * tsample
--please do not edit the information below--
Version:
platform = powerpc-unknown-linux-gnu...
2003 Sep 03
0
Updated power.t.test
...delta, sd, power, sig.level), is.null)) != 1)
stop("exactly one of n, delta, sd, power, and sig.level must be NULL")
}
alternative <- match.arg(alternative)
df.method <- match.arg(df.method)
tsample <- switch(type, one.sample = 1, two.sample = 2, paired = 1)
tside <- switch(alternative, one.sided = 1, two.sided = 2)
if (tside == 2 && !is.null(delta))
delta <- abs(delta)
p.body <- quote({
nu <- switch(tsample, n-1, switch(df.method, welch=(sd^2/n + (sd*sd.ratio)^2/(n*ratio))^2/((sd^2/n)^2/(n-1) + ((sd*sd.ratio)^2/(ratio*n))^2/...
2003 May 30
0
power.t.test needs to check delta==NULL before abs(delta) (PR#3140)
...--- rossini.power.t.test.R 2003-05-30 07:24:49.000000000 -0700
> +++ rossini.power.t.test.R.~1~ 2003-05-30 08:47:09.000000000 -0700
> @@ -10,7 +10,7 @@
> alternative <- match.arg(alternative)
> tsample <- switch(type, one.sample = 1, two.sample = 2, paired = 1)
> tside <- switch(alternative, one.sided = 1, two.sided = 2)
> - if (tside == 2 && !is.null(delta))
> + if (tside == 2)
> delta <- abs(delta)
> p.body <- quote({
> nu <- (n - 1) * tsample
>
>
> --please do not edit the information below--
>
&...
2004 May 12
1
Formula of power.t.test
Dear Sir or Madam,
What is the formula for power.t.test(delta=delta, sd=segma, sig.level=0.05,
power=0.8, type="one.sample", alternative="one.sided")$n?
Thank you very much for the help!
Best,
Xiaorong
2001 Sep 30
1
(No Subject)
Dear all
I am very beginner user of R I want to calculate the power of t-test using power.t.test function. It is stated in the manual that the argument (n) is the number of observations per group. Infact I have a differens number of observations in each group(ie n1<>n2) and another thing is SD the pooled standard deviation of the observations in the two data sets under investigation.
Hope
2008 Dec 16
1
pwr.prop.test and continuity correction
Hi,
I am trying to sort out a discrepancy between power calculations results
between me and another statistician. I use R but I am not sure what she
uses. It is on the proportions test and so I have been using
pwr.prop.test. I think I have tracked the problem down to pwr.prop.test
not using the continuity correction for the test (I did this by using
the java applet from
2007 Mar 05
1
new crashes: is the index/mail cache endian neutral?
...Error: IMAP(foobar): Corrupted index file /home/foobar/
Mail/imapd-indices/.imap/INBOX/dovecot.index: messages_count too large (0 > 0)
dovecot: Mar 01 08:46:50 Error: IMAP(foobar): Corrupted index cache file /home/f
oobar/Mail/imapd-indices/.imap/INBOX/dovecot.index.cache: field header points ou
tside file
dovecot: Mar 01 08:46:51 Error: IMAP(foobar): Corrupted transaction log file /ho
me/foobar/Mail/imapd-indices/.imap/INBOX/dovecot.index.log: unknown record type
0x10
dovecot: Mar 01 08:46:51 Warning: IMAP(foobar): fscking index file /home/foobar/
Mail/imapd-indices/.imap/INBOX/dovecot.index
d...