By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 4.0 seconds.
Answer each of the following (show all work):
(A) How many measurements should be made in order to be 99% certain that the maximum error of estimation will not exceed 1 second?
(B) What sample size is required for a maximum error of 2 seconds?