A recent survey was taken to determine the cost of gas energy. Results of the survey revealed
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A recent survey was taken to determine the cost of gas energy. Results of the survey revealed that the
The average monthly utility bill of a three-bedroom house using gas was $125 and the standard deviation was $15.
If nothing is known about the distribution of utility bills, what can you say about the fraction of all three-bedroom homes that have gas bills between $80 and $170?
If it can be assumed that the distribution of utility bills is mound-shaped, approximately what proportion of three-bedroom homes would have monthly bills less than $110?
Related Book For
Essentials of Business Communication
ISBN: 978-1111821227
9th edition
Authors: Mary Ellen Guffey, Dana Loewy
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