By measuring the amount of time it takes the component of product to move from one workstation to the next, an engineer has estimated that standard deviation is 4.17 seconds.
Answer each of the following (show all work):
(A) How many measurements must be made in order to be 95% certain that maximum error of estimation will not exceed 0.5 seconds?
(B) What sample size is needed for the maximum error of 2.0 seconds?