A population has mean of 750 and standard deviation of 80. A sample of size 64 will be taken from this population. a)Find the standard deviation of X.( b)What is the probability that X exceeds 765? c) What is the probability that X is between 745 and 770?

A population has mean of 750 and standard deviation of 80. A sample of size 64 will be taken from this population. a)Find the standard deviation of X.( b)What is the probability that X exceeds 765? c) What is the probability that X is between 745 and 770?

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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Question

A population has mean of 750 and standard deviation of 80. A sample of size 64 will be taken from this population.

a)Find the standard deviation of X.(

b)What is the probability that X exceeds 765?

c) What is the probability that X is between 745 and 770?

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What is the correct answer of this questions? Show your work
A,b,c