(Answered) A doctor is interested in determining whether a film about

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A doctor is interested in determining whether a film about exercise makes a significant difference in 10 persons' attitudes about exercise. The results of his questionnaire are shown. A higher numerical value shows a more favorable attitude toward exercise. Is there enough evidence to support the claim at level of significance 0.05, that there was a significant difference in change of attitude? Also find the 95% confidence for the mean difference.

Before 12 11 14 9 8 6 8 5 4 7

After 13 12 10 9 8 8 7 6 5 5

Several Independent Populations, Homogeneity of Proportions (chi-square distribution)

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