For a package delivery business, historical data shows that delivery times follow aNormal distribution with mean 60 minutes and standard deviation 10 minutes. Whatsample size is needed so that the probability of the mean delivery time of a sampleexceeding 65 minutes is at-most 1%? In other words, find the minimum value of n sothatP(x > 60) < 0.01n=20n=23n=22n=21

Given that X~N(μ= 60 , σ= 10 ) μ= 60 , σ= 10

Answered: For a package delivery business,…

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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A random sample of n=16 scores is obtained from a population with a standard deviation of 16. If the sample mean is greater than 8 points greater than the population mean, what is the z-score for the sample mean?
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