Use the data of Problem 16.

(a) Compute the sample mean and sample median.

(b) Are the data approximately normal?

(c) Compute the sample standard deviation s.

(d) What percentage of the data fall within ¯x ±1.5s?

(e) Compare your answer in part

(d) to that given by the empirical rule.

(f ) Compare your answer in part

(d) to the bound given by Chebyshev’s inequality.