One-way ANOVA

[mattc]

You are interested in comparing four methods of teaching. You randomly assign 20 students to each of the four methods and then administer a standardized test at the end of the study.

a) What null hypothesis you interested in testing?
b) What statistical procedure might you use to test the hypothesis?
c) What assumptions are necessary for the statistical procedure you have selected?

I think the answer to part b is one-way ANOVA. Thanks for the help.

[omega]

You are right that part b is one-way nanova. The null hypothesis is as follow: Let mu1, mu2, mu3, mu4 be the population means for the for methods, respectively. H0: mu1=mu2=mu3=mu4

And the assumptions of one-way ANOVA are 1) the four populations have normal distributions. 2) the samples are randomly selected, and each sample is independent from the other samples. 3) the four populations all have the same population variance.