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September 30, 2014

September 30, 2014

Posted by **Nickie** on Sunday, February 10, 2013 at 1:43am.

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 r2, 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.

- STAT -
**PsyDAG**, Sunday, February 10, 2013 at 12:47pma. Divide SS by the number of scores to get variance.

Standard deviation = square root of variance

Z = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.

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