SOLUTION: I tried reading the text more than once and even tried the hints that were given but....thanks in advance By measuring the amount of time it takes a component of a product to move

Question 663785: I tried reading the text more than once and even tried the hints that were given but....thanks in advance
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 3.15 seconds. Please answer the following and 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 1.0 seconds? B) what sample size is required for a maximum error of 2.0 seconds?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
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 3.15 seconds. Please answer the following and 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 1.0 seconds? ------
n = [z*s/E]^2
---
n = [2.5758*3.15/1.0]^2 = 66 when rounded up
=====================================================
B) what sample size is required for a maximum error of 2.0 seconds?
n = [2/5758*3.15/2]^2 = 17 when rounded up
=============================
Cheers,
Stan H.

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