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please show work. thank you. 7. A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly selected subjects are given the

please show work. thank you.

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7. A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly 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. Assume the data are normally distributed

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