Suppose that the number of customers who enter asupermarket each hour is normally distributed with amean of 520 and a standard deviation of 210. Thesupermarket is open 12 hours per day. What is theprobability that the total number of customers whoenter the supermarket in one day is greater than7400? (Hint: Calculate the average hourly number ofcustomers necessary to exceed 7400 in one 12-hourday.)

Here original population is normal and hence sampling distribution will be always normal.

Answered: Suppose that the number of customers…

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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1. Lori just bought a set of 4 tires for her car. The life of a tire is normally distributed with a mean of 45000 miles and a standard deviation of 2000 miles. Find the probability that all 4 tires will last for at least 46000 miles. Assume independence of tires between one another.
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