Chapter 11, Problem 2RE

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

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.

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

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.

**a.**

To determine

**To find:** Whetherthere is a significant difference between the attitudes of males and females using two-tailed testat

Explanation

**Given info:**

Two samples of males and females each with size 9 and 15 have means 33 and 42 respectively. Similarly, both of them have sum of squared difference (SS) equal to 740 and 1240 respectively.

**Calculations:**

Step 1:

*Stating the testing hypotheses:*

*Null Hypothesis*

*Alternate Hypothesis*

Step 2: For the given sample, the t-statistics will have degrees of freedom equals:

For a two-tailed test with

Step 3: t-statistics is calculated using formula:

But before that calculate pooled variance,

Substitute 740for

Now

**b.**

To determine

**To Find:** The value of

**c.**

To determine

**To describe:** The outcome of the hypothesis test and the measure of the effect size.

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