12.26 Use these data—incidents of reports of underage drinking at universities—to perform the following tasks: “Dry” campus, state school: 47, 52, 27, 50 “Dry” campus, private school: 25, 33, 31 “Wet” campus, state school: 77, 61, 55, 48 “Wet” campus, private school: 52, 68, 60

a. Calculate the cell and marginal means. Notice the unequal Ns.

b. Draw a bar graph.

c. Calculate the five different degrees of freedom, and indicate the critical F value based on each set of degrees of freedom, assuming the alpha level is 0.05.

d. Calculate the total sum of squares.

e. Calculate the between-groups sum of squares for the independent variable campus.

f. Calculate the between-groups sum of squares for the independent variable school. g. Calculate the within-groups sum of squares. h. Calculate the sum of squares for the interaction. i. Create a source table.