4.91 Source: Dahlen, M., et al. “The effects of communicating passion in advertising,” Journal of Advertising Research, Volume 60, Number 1, March 2020 (Table 3).

a. Graph the four treatment means in a schematic similar to Figure 9.23. Comment on whether the two factors interact.

b. The researchers determined that the Product * Ad Type interaction was nonsignificant (p-value 7 .10). Interpret this result practically.

c. The researchers determined that the Product main effect was nonsignificant (p-value 7 .10). Interpret this result practically.

d. The researchers determined that the Ad Type main effect was statistically significant (p-value 6 .01). Interpret this result practically. Use the treatment means in your answer.