A Sears department store manager would like to estimate the average (mean) amount of purchases per month by its customers with charge accounts to within $17 (the desired margin of error) with 90 percent confidence. How many accounts should be selected from the store’s records if the population standard deviation of monthly account balances is estimated to be $80?
A Sears department store manager would like to estimate the average (mean) amount of purchases per month by its customers with charge accounts to within $17 (the desired margin of error) with 90 percent confidence. How many accounts should be selected from the store’s records if the population standard deviation of monthly account balances is estimated to be $80?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 1GP
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A Sears department store manager would like to estimate the average (mean) amount of purchases per month by its customers with charge accounts to within $17 (the desired margin of error) with 90 percent confidence. How many accounts should be selected from the store’s records if the population standard deviation of monthly account balances is estimated to be $80?
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