Refer to Exercise 10.16. Since n 30, use the methods of Chapter 8 to create a large-sample

Question:

Refer to Exercise 10.16. Since n 30, use the methods of Chapter 8 to create a large-sample 95% confidence interval for the average serum cholesterol level for L.A. County employees. Compare the two intervals.
Exercise 10.16
The serum cholesterol levels of 50 subjects randomly selected from the L.A. Heart Data, data from an epidemiological heart disease study on Los Angeles County employees, follow.