Posted by Student on .
testing for the differences between means of 2 independent populations where the variances in each population r unknown, u must first perform the Ftest for the difference between 2 variances. Which of the following is correct? a)If the null hypothesis of the Ftest is rejected, then use the pooled variance t test for the difference between the means. b)If the null hypothesis of the Ftest is not rejected, then use the separate variance t test for the difference between the means. c) If the alternative hypothesis of the Ftest is accepted, then use the pooled variance t test for the difference between the means. d)Both (a)n(c)are correct. e)None

Statistics 
MathGuru,
You may want to check this, but I would lean towards d) because a) and c) are saying the same thing. If the null is rejected, then the alternative would be accepted. Usually when doing an Ftest and the null is rejected, it is often necessary to do additional analysis to test for difference between means.