Automotive engineers have found that the gas mileage in highway driving of a certain sports utility van is normally distributed with a mean of 13.6 kilometers per liter and a standard deviation of 1.5 kilometers per liter. Find the probability that a random sample of 30 sports utility

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Automotive engineers have found that the gas mileage in highway
driving of a certain sports utility van is normally distributed with
a mean of 13.6 kilometers per liter and a standard deviation of
1.5 kilometers per liter.
Find the probability that a random sample of 30 sports utility
vans has a mean exceeding 14 kilometers per liter.
O P(Z < 1.46) = 0.9279
O P (Z > 1.46) = 0.0721
%3D
O P(Z > –1.46) = 0.9279
O P(Z < –1.46) = 0.0721
%3D
Transcribed Image Text:Automotive engineers have found that the gas mileage in highway driving of a certain sports utility van is normally distributed with a mean of 13.6 kilometers per liter and a standard deviation of 1.5 kilometers per liter. Find the probability that a random sample of 30 sports utility vans has a mean exceeding 14 kilometers per liter. O P(Z < 1.46) = 0.9279 O P (Z > 1.46) = 0.0721 %3D O P(Z > –1.46) = 0.9279 O P(Z < –1.46) = 0.0721 %3D
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