The average time a person spends shopping in a grocery store is 43 minutes. If the time is normally distributed with astandard deviation of 8 minutes, find the probability that the mean time for a sample of 20 shoppers will be between42 and45 minutes.0.9540.712O 0.581O 0.869

Given,sample size(n)=20mean(μ)=43standard deviation(σ)=8

Answered: The average time a person spends…

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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Assume that the average weight of an NFL player is 245.7 lbs with a standard deviation of 34.5 lbs. The distribution of NFL weights is not normal. Suppose you took a random sample of 32 players. What is the probability that the sample average will be greater than 260 lbs? Round your answer to three decimal places, eg 0.192.
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Assume that the average weight of an NFL player is 245.7 lbs with a standard deviation of 34.5 lbs. The distribution of NFL weights is not normal. Suppose you took a random sample of 32 players. What is the probability that the sample average will be greater than 240 lbs? Round your answer to three decimal places, eg 0.192.
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The average time a person spends shopping in a grocery store is 43 minutes. If the time is normally distributed with a standard deviation of 8 minutes, find the probability that the mean time for a sample of 20 shoppers will be between 42 and 45 minutes. O 0.954 O 0.712 0.581 0.869