The monthly utility bills in a city are normally distributed, with a mean of $100 and a

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The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $10.

a) Find the probability that a randomly selected utility bill is between $85 and $125.

b) If 300 utility bills are randomly selected from this city, approximately how many of them will be more than $115.

c) Find a value of the utility bill such that only 5% of utility bills in this city are larger than that.

Related Book For answer-question

Elementary Statistics Picturing the World

ISBN: 978-0321911216

6th edition

Authors: Ron Larson, Betsy Farber

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Posted Date: Aug 19, 2020 02:04 AM

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The monthly utility bills in a city are normally distributed, with a mean of $100 and a

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Elementary Statistics Picturing the World

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