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A car salesperson claims that the mean gas mileage for its luxury sedan is at least...

A car salesperson claims that the mean gas mileage for its luxury sedan is at least 25 miles per gallon​ (mpg). A random sample of 30 cars has a mean gas mileage of 24 mpg and a (sample) standard deviation of 3.5 mpg.

            a)    State the null and alternative hypotheses.              b)    Determine the P-Value

            c)     State the outcome of the test at α = 0.05  

Math   Statistics-And-Probability   
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