Question 366950
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 3.92 seconds. Answer each of the following and (show all work).
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(A). How many measurements should be made in order to be 90% certain that the maximum error of estimation will not exceed 2.0 sceonds?
n = [zs/E]^2
n = [1.645*3.92/2]^2
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(B). What sample is required for a maximum error of 1.5 seconds?
n = [1.645*3.92/1.5]^2
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11.37 and the sample size is 35, answer each of the following (show all work): 
(A). Determine the maximum error of the estimate, E.
??? 
(B). Determine the confidence level used for the given confidence interval. 
???
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A confidence interval estimate for the population mean is given to be (37.46, 46.39). If the standard deviation is 
???
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Cheers,
Stan H.