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question 18 Find the confidence interval specified. Assume that the population is normally distributed. 18) A sociologist develops a test to measure attitudes about public

question 18
Find the confidence interval specified. Assume that the population is normally distributed. 18) A sociologist develops a test to measure attitudes about public transportation, and 27 randomly 18) selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence interval for the mean score of all such subjects. A) 64.2 to 88.2 B) 74.6 to 77.8 C) 69.2 to 83.2 D) 67.7 to 84.7

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