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A U.S. labor economist interviews 581 workers and finds that the mean number of hours they worked in the last week was 36.9 with a
A U.S. labor economist interviews 581 workers and finds that the mean number of hours they worked in the last week was 36.9 with a standard deviation of 3.6 hours.Make a 95% confidence interval for the mean of all workers in the U.S.
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