Given a normal random variable X with mean 72 and variance 25, and a random sample of size n taken from the distribution, what sample size n is necessary in order that P(71.7 ≤x≤72.3) = 0.985? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. The necessary sample size is n= (Round up to the nearest whole number.) ***

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Given a normal random variable X with mean 72 and variance 25, and a random sample of size n taken from the distribution, what sample
size n is necessary in order that P(71.7 ≤x≤72.3) = 0.985?
Click here to view page 1 of the standard normal distribution table.
Click here to view page 2 of the standard normal distribution table.
0
The necessary sample size is n =
(Round up to the nearest whole number.)
Transcribed Image Text:Given a normal random variable X with mean 72 and variance 25, and a random sample of size n taken from the distribution, what sample size n is necessary in order that P(71.7 ≤x≤72.3) = 0.985? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. 0 The necessary sample size is n = (Round up to the nearest whole number.)
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