Question

# If we have two group means to compare, we use a z or t test as we have seen, assuming we can meet the assumptions

of a parametric test. If we have three or more group means to compare, we would have to do multiple z or t tests, but this is just not feasible, and multiple tests would increase our probability of type 1 error. So we use ANOVA. ANOVA uses the F ratio (a ratio of Variances) to inform us on any differences among group means. Discuss.

How do you interpret the ANOVA table in Checkpoint 4?

Statistics and Probability

If we have two group means to compare we use a z or t test as we have seen assuming we can meet the assumptions