Review Preparation for Statistics A statistics instructor

Chapter 12, Problem 8

(choose chapter or problem)

Review Preparation for Statistics A statistics instructor wanted to see if student participation in review preparation methods led to higher examination scores. Five students were randomly selected and placed in each test group for a three-week unit on statistical inference. Everyone took the same examination at the end of the unit, and the resulting scores are shown below. Is there sufficient evidence at a _ 0.05 to conclude an interaction between the two factors? Is there sufficient evidence to conclude a difference in mean scores based on formula delivery system? Is there sufficient evidence to conclude a difference in mean scores based on the review organization technique? (123)