Show that ifx is used as a point estimate of u and o is known, the probability is a. a that |x -ul, the absolute value of our error, will not exceed a specified amount e when b. An efficiency expert...

Extracted text: Show that ifx is used as a point estimate of u and o is known, the probability is a. a that |x -ul, the absolute value of our error, will not exceed a specified amount e when b. An efficiency expert wants to determine the average amount or ime it takes a pit crew to change a set of four tires on a race car. Use the expression in (a) above to determine the sample size that is needed so that the efficiency expert can assert with probability 0.95 that the sample mean will differ from µ, the quantity to be estimated, by less than 2.5 seconds. It is known from previous studies that o = 12.2 seconds.