Cholesterol, continued Refer to Exercise 10.16. Since n > 30, use the methods of...

Cholesterol, continued 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. (HINT: The two intervals should be quite similar. This is the reason we choose to approximate the sample

Reference:

Cholesterol 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,5 follow.

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

b. Use a t-distribution to construct a 95% confidence interval for the average serum cholesterol levels for L.A. County employees.