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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 S(M1 - M2) t Statistic Critical Values t Distrbution Degrees of Freedom-2 50 40 30 20 1.0 0.0 10 2.0 3.0 40 5.0 The results indicate

46-10-2.0-1.0 0.0 1.0 2.0 10 .。 3.0 4O5 The results indicate: O Failure to reject the null hypothesis; there is a significant difference between the attitudes for males and for fenales O Rejection of the null hypothesis; there is a significan t difference between the attitudes for males and for females O Rejection of the null hypothesis; there is no significant difference between the attitudes for males and for females O Failure to reject the null hypothesis; there is no significan t difference between the attitudes for males and for females Compute r, , the percentage of variance accounted for by the gender difference, to measure effect size for this study Write a sentence demonstrating how the result of the hyoothesis test and the messure of effect size would appear in a research report Concen about the negative aspects of eating for males less than it is for females, significantly

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Answer #1

Pooled varaince SS, SS, 740+1240_o Pooled SD s- 90 = 9487 9 15 Test Staisic under H. X1- A2 X1-A2 33-42 =-2.25 9.487-+_ 9 15 t critical value-12.079614

Distribution Plot T, df 21 0.4 0.3 F 0.2 0.1 0.025 0.025 0.0 2.080 2.080

Correct answer: Option (B) reject the null hypothesis. there is significance
difference between the attitudes for males and for females

The square correlation coefficient is 2.250.1942 t+af 2.25* +21 19.42% percentage of the variance accounted for by the treatment effect

Concerm about the negative aspects of eating for males is significantly less than it is for females

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