Question: A machine produces parts with lengths that are normally distributed with σ = 0.63. A sample of 15 parts has a mean length of 76.05.

(a) Give a point estimate for μ. (Give your answer correct to two decimal places.)

(b) Find the 99% confidence maximum error of estimate for μ. (Give your answer correct to three decimal places.)

(c) Find the 99% confidence interval for μ. (Give your answer correct to three decimal places.)

Lower Limit

Upper Limit