A study of bulimia among college women consid ered the effect of childhood sexual abuse on various

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A study of bulimia among college women consid ered the effect of childhood sexual abuse on various components of a Family Environment Scale. For a measure of family cohesion, the sample mean for the bulimic students was 2.0 for 13 sexually abused students and 4.8 for 17 nonabused students. Table 7.19 shows software results of a two-sample comparison of means.

(a) Assuming equal population standard devia- tions, construct a 95% confidence interval for the difference in mean family cohesion for sex- ually abused students and nonabused students. Interpret.

(b) Explain how to interpret results of significance tests from this printout.

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