Statistics for Business & Economics
12th Edition
ISBN: 9781285528830
Author: David R. Anderson
Publisher: Cengage Learning US
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Chapter 3.3, Problem 40E
The energy information Administration reported that the mean retail price per gallon of regular grade gasoline was $3.43 (Energy Information Administration, July 2012). Suppose that the standard deviation was $.10 and that the retail price per gallon has a bell-shaped distribution.
- a. What percentage of regular grade gasoline sold between $3.33 and $3.53 per gallon?
- b. What percentage of regular grade gasoline sold between $3.33 and $3.63 per gallon?
- c. What percentage of regular grade gasoline sold for more than $3.63 per gallon?
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Chapter 3 Solutions
Statistics for Business & Economics
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