Show neat and complete solution. ( The average fuel efficiency of U.S. light vehicles (cars, SUVs, minivans, vans, and light trucks) for 2005 was 21 miles per gallon (mpg). If the standard deviation of the population was 2.8 and the gas ratings were normally distributed, (a) what is the probability that the mean mpg for a random sample of 25 light vehicles is under 18? (b) between 20 and 24? Given: Required: Solution: a. b.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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The average fuel efficiency of U.S. light vehicles (cars, SUVs, minivans, vans,
and light trucks) for 2005 was 21 miles per gallon (mpg). If the standard deviation
of the population was 2.8 and the gas ratings were normally distributed, (a) what
is the probability that the mean mpg for a random sample of 25 light vehicles is
under 18? (b) between 20 and 24?
Given:
Required:
Solution:
a.
b.
Transcribed Image Text:Show neat and complete solution. (... The average fuel efficiency of U.S. light vehicles (cars, SUVs, minivans, vans, and light trucks) for 2005 was 21 miles per gallon (mpg). If the standard deviation of the population was 2.8 and the gas ratings were normally distributed, (a) what is the probability that the mean mpg for a random sample of 25 light vehicles is under 18? (b) between 20 and 24? Given: Required: Solution: a. b.
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