The Average Gas Mileage of a 4-Wheel Drive Truck Is

Short Answer

The average gas mileage of a 4-wheel drive truck is 18.2 miles per gallon. The average gas mileage for 7 randomly selected trucks are listed below.
a. Assume the gas mileage distribution is normal. It is of interest to know if the sample data suggest the average gas mileage is different from 18.2 miles per gallon.
b. Compute the test statistic for the hypotheses in (a).
Test Statistic = ______________
c. Compute the approximate p-value associated with the test statistic in (b).
P-Value = ______________
d. Does the sample data support the null hypothesis at the
= 0.05 level?
______________