t-test confidence interval
Kemp S E (Comp <sekemp <at> glam.ac.uk> writes:
Hi, Does anyone know of a pre-existing function where I can get the t-test confidence interval for a given mean, sd, degrees of freedom and confidence limit. I do NOT want to run any data through the t.test function. Kind regards, Sam.
how about mean+c(-1,1)*sd*qt(1-alpha/2,df) ?