15. Do you view a chocolate bar as delicious or as fattening? Your attitude may depend on your gender.

In a study of American college students, Rozin, Bauer, and Catanese (2003) examined the importance of food as a source of pleasure versus concerns about food associated with weight gain and health. The following results are similar to those obtained in the study. The scores are a measure of concern about the negative aspects of eating.

Males Females n  9 n  15 M  33 M  42 SS  740 SS  1240

a. Based on these results, is there a significant difference between the attitudes for males and for females? Use a two-tailed test with  .05.

b. Compute r 2

, the percentage of variance accounted for by the gender difference, to measure effect size for this study.

c. Write a sentence demonstrating how the result of the hypothesis test and the measure of effect size would appear in a research report.