MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Hypothesis Testing :

An auto maker estimates that the mean gas mileage of its sports utility vehicle is 20 miles per gallon. A random sample of 8 such vehicles had a mean of 18 miles per gallon and a standard deviation of s= 5 miles per gallon. At α= 0.05, can you conclude that this kind of vehicle has gas mileage less than 20 miles per gallon? Assume the populationis normally distributed.

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