The USGA requires that golf balls have a weight that is less than 1.62 ounces. An engineer for the USGA wants to verify that a company’s golf balls conform to USGA standards. A random sample of 12...

The USGA requires that golf balls have a weight that is less than 1.62 ounces. An engineer for the USGA wants to verify that a company’s golf balls conform to USGA standards. A random sample of 12 golf balls from this company is obtained and the weights are given below.

                    1.614  1.614  1.621  1.621  1.619  1.610  1.612  1.602  1.614  1.610  1.615  1.617

Construct a 90% confidence interval for the mean weight of this company’s golf balls. Assume normality.

The USGA requires that golf balls have a weight that is less than 1.62 ounces. An engineer for the USGA wants to verify that a company’s golf balls conform to USGA standards. A random sample of 12 golf balls from this company is obtained and the weights are given below.

                    1.614  1.614  1.621  1.621  1.619  1.610  1.612  1.602  1.614  1.610  1.615  1.617

Construct a 90% confidence interval for the mean weight of this company’s golf balls. Assume normality.

(0.70881, 2.5194)

(1.6107, 1.6175)

(0.85436, 2.3738)

(1.6116, 1.6166)

(1.6113, 1.6168)