I would like to ask Qb. I think it's using the normal approximation to calculate the answer but I can't. 2. It is known that weights of packs of potato chips produced by a certain factoryfollow a normal distribution of mean 80 g and standard deviation 0.8 g.(a) Suppose that 115 packs of potato chips are randomly chosen. Find the probabilitythat their average weight is at least 79.91 g.(b) Suppose that 115 packs of potato chips are randomly chosen. Find the probabilitythat at most 57 packs of potato chips weigh at least 79.91 g.(c) Suppose that 22 packs of potato chips are randomly chosen and let s 2 be thesample variance of their weights. Find positive numbers K1 and K2 so that P(s > K2) =P(s < K1) and P(K1 < s < K2) = 0.8.

The random variable X which represents the weighs of pack of potato chip. The probability that a…

Answered: (b) Suppose that 115 packs of potato…

(b) Suppose that 115 packs of potato chips are randomly chosen. Find the probability that at most 57 packs of potato chips weigh at least 79.91 g.

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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Estimation

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I would like to ask Qb. I think it's using the normal approximation to calculate the answer but I can't.

2. It is known that weights of packs of potato chips produced by a certain factory
follow a normal distribution of mean 80 g and standard deviation 0.8 g.
(a) Suppose that 115 packs of potato chips are randomly chosen. Find the probability
that their average weight is at least 79.91 g.
(b) Suppose that 115 packs of potato chips are randomly chosen. Find the probability
that at most 57 packs of potato chips weigh at least 79.91 g.
(c) Suppose that 22 packs of potato chips are randomly chosen and let s 2 be the
sample variance of their weights. Find positive numbers K1 and K2 so that P(s > K2) =
P(s < K1) and P(K1 < s < K2) = 0.8.

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