In Problem 6 at the end of Chapter 11 (page 325), we presented a study showing that a visible tattoo can significantly lower the attractiveness rating of a woman shown in a photograph (Resenhoeft, Villa, &

Wiseman, 2008). In a similar study, a sample of n 5 9 males looks at a set of 30 photographs of women and rates the attractiveness of each woman using a 10-point scale (10 5 most positive). One photograph appears twice in the set, once with a tattoo and once with the tattoo removed. For each participant, the researcher records the ratings for the two photographs.

The results are shown in the following table.

a. Use a repeated-measures ANOVA with a 5.05 to determine whether the mean difference between treatments is significant.

b. Now use a repeated-measures t test with a 5.05 to evaluate the mean difference between treatments.

Comparing your answers from a and

b, you should find that F 5 t 2

.

Participant No Tattoo With Tattoo A 7 5 B 9 3 C 7 5 D 8 3 E 9 8 F 6 3 G 6 6 H 8 3 I 6 3