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Question 9 A recent study of 40 twelfth grade students, the mean number of hours per week that they watched television was 18.5. The standard

Question 9 A recent study of 40 twelfth grade students, the mean number of hours per week that they watched television was 18.5. The standard deviation for the sample was 2.5 Find the 95% confidence interval of the mean A 17.73

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