AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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gang
September 12, 2019 03:53PM
Assume that 1) by "z-score" you mean Fisher-transformed z-score, and 2) you have the output from 3dttest++. To obtain the upper bound for the 95% confidence interval, get the degrees of freedom (DF) for the t-stat, and try

3dcalc -a myBeta -b myTstat -expr 'a+fitt_p2t(0.05,DF)*a/b' -prefix upperBound

Similarly for the lower bound

3dcalc -a myBeta -b myTstat -expr 'a-fitt_p2t(0.05,DF)*a/b' -prefix upperBound

Gang



Edited 1 time(s). Last edit at 09/12/2019 07:55PM by Gang.
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Subject Author Posted

confidence interval calculation for t-test

astasenko September 11, 2019 04:25PM

Re: confidence interval calculation for t-test

gang September 12, 2019 03:53PM