Create a grouping variable based on an approximate “median split” of the phobia scores so that one group contains the students with the 55 lowest phobia scores, and the other has the 45 highest phobia scores. Then perform a two-way ANOVA on postquiz heart rate, using the new phobia grouping variable and the quiz conditions (last question easy, moderate, difficult, or impossible) as your two factors.

a. Request a graph of the cell means, and refer to the graph to explain the results of the two-way ANOVA.

b. Test all of the possible pairs of levels for the quiz-condition factor.