Answered: The Longmont Computer Leasing Company…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The Longmont Computer Leasing Company wishes to estimate the mean number of pages that will be printed in a month on its leased printers. The plan is to select a random sample of printers and record the number on each printer's counter at the beginning of May. Then, at the end of May, the number on the counter will be recorded again and the difference will be the number of copies on that printer for the month. The company wants the estimate to be within ±140 pages of the true mean with a 98%
confidence level. Complete parts a and b below.

a. The standard deviation in pages printed is thought to be about

1,100 pages. How many printers should be sampled?

How many many printers should be sampled?
b.Suppose the standard deviation is off+- by 10%. What percentage change in the required sample size would this produce?

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