Posted by marsha on Monday, April 28, 2014 at 9:30pm.
for a hypothesis comparing two population means, what is the critical value for a onetailed hypothesis test, using a 5percent level of significance level, with both sample sizes equal to 13? the standard deviations for the samples are 5 and 7. assume the population standard deviations are unequal

statistics  MathGuru, Tuesday, April 29, 2014 at 6:10pm
If you have equal sample sizes and unequal standard deviations, a Welch's ttest might be appropriate. Check degrees of freedom for this type of test before checking the appropriate table to determine critical value.