According to the U.S. Energy Information Administration, the mean monthly household electric bill in the United States

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According to the U.S. Energy Information Administration, the mean monthly household electric bill in the United States in a recent year was $110.14. Assume the amounts are normally distributed with standard deviation

$20.00.

a. What proportion of bills are greater than $130?

b. What proportion of bills are between $85 and $140?

c. What is the probability that a randomly selected household had a monthly bill less than

$120?

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Elementary Statistics

ISBN: 9781259969454

3rd Edition

Authors: William Navidi, Barry Monk

Question Posted: May 06, 2024 12:01 PM

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According to the U.S. Energy Information Administration, the mean monthly household electric bill in the United States

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Elementary Statistics

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