(STATISTICS) Test whether the variance of the task times of tasks 1 and 2 are different at a 0.05 significance level.

Question

a)Test whether the variance of the task times of tasks 1 and 2 are different at a 0.05 significance level.

b)) Test whether the task times of these three tasks are different at a 0.05 significance level. If there is a difference figure out which one(s) is(are) different

Answer 1

you perform ANOVA to test the null hypothesis that test1 mean =test2 mean=test3 mean. Then if the F test is significant, you conclude that at least one test mean is different. In order to know which one, you run a post hoc test ( e.g., Bonferroni) to see which two tests are different