10.16 Cholesterol The serum cholesterol levels of 50 subjects randomly selected from the L.A. Heart Data, data...

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10.16 Cholesterol The serum cholesterol levels of 50 subjects randomly selected from the L.A. Heart Data, data from an epidemiological heart disease study on employees, follow."

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a. Construct a histogram for the data. Are the data approximately mound-shaped?

b. Use at distribution to construct a 95% confidence interval for the average serum cholesterol levels for employees.

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