A sports psychologist studied the effect of a motivational program on injuries among players of three different sports. The following chart shows the design. For each of the following possible patterns of results, make up a set of cell means, figure the marginal means, and make a bar graph of the results (assume that any differences are statistically significant):
(a) A main effect for type of sport and no other main effect or interaction.
(b) A main effect for program and no other main effect or interaction.
(c) Both main effects but no interaction;
(d) A main effect for program and an interaction, but no main effect for type of sport.
(e) Both main effects and an interaction.
Measured Variable: Number of injuries per person over 10 weeks

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Sport Baseball Football Basketbal With motivational program Without motivational program