A random sample of size 21 isselected from Normaldistribution with mean 12 andunknown variance. If thesample standard deviation Sis 4, then the (90.)thpercentile of the samplemean is closest to:a. 12.50O b. 12.20O c. 10.80O d. 13.20O e. 11.10

Given,sample size(n)=21mean(μ)=12standard deviation(s)=4

Answered: A random sample of size 21 is selected…

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 size 21 is selected from Normal distribution with mean 12 and unknown variance. If the sample standard deviation S is 4, then the (90.)th percentile of the sample mean is closest to: O a. 12.50 O b. 12.20 O c. 10.80 O d. 13.20 O e. 11.10