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Asked Dec 16, 2019

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A car company claims that the mean gas mileage for its luxury sedan is at least 24 miles per gallon. A random sample of 7 cars has a mean gas mileage of 23 miles per gallon and a standard deviation of 1.1 miles per gallon. At α=0.05, can you support the company’s claim assuming the population is normally distributed?

Group of answer choices

Step 1

Null hypothesis:

*µ *≥ 24.

Alternative hypothesis:

*µ*<24.

Since the population standard deviation is unknown, the appropriate test is one sample *t*-test.

Here, the sample mean, *x*-bar is 23.

S...

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