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7.62 The amount of time a bank teller spends with each customer has a population mean = 3.10 minutes and standard deviation = 0.40 minute. If a random sample of 16 customers is selected without replacement from a popu- lation of 500 customers, a. what is the probability that the mean time spent per cus- tomer is at least three minutes? b. there is an 85% chance that the sample mean is less than how many minutes?

7.62 The amount of time a bank teller spends with each customer has a population mean = 3.10 minutes and standard deviation = 0.40 minute. If a random sample of 16 customers is selected without replacement from a popu- lation of 500 customers, a. what is the probability that the mean time spent per cus- tomer is at least three minutes? b. there is an 85% chance that the sample mean is less than how many minutes?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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7.62 The amount of time a bank teller spends with each customer has a population mean μ = 3.10 minutes and standard deviation o= 0.40 minute. If a random sample of 16 customers is selected without replacement from a popu- lation of 500 customers, a. what is the probability that the mean time spent per cus- tomer is at least three minutes? b. there is an 85% chance that the sample mean is less than how many minutes?
Transcribed Image Text:7.62 The amount of time a bank teller spends with each customer has a population mean μ = 3.10 minutes and standard deviation o= 0.40 minute. If a random sample of 16 customers is selected without replacement from a popu- lation of 500 customers, a. what is the probability that the mean time spent per cus- tomer is at least three minutes? b. there is an 85% chance that the sample mean is less than how many minutes?
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