A car manufacturer stated in its advertising that the gas mileage for its hybrids will be greater than 40 mpg on average. A consumer agency tested a sampling of the hybrids under a variety of conditions. Based on these tests, the agency concluded that the manufacturer was justified in making this claim. The process described is an example of:
A) descriptive statistics.
B) hypothesis testing.
C) statistical inference.
D) Both B and C are correct.

Question

Quizplus · Accepted Answer

The process involves hypothesis testing, where the claim of greater than 40 mpg is evaluated, and statistical inference, where conclusions about the population (all hybrids from the manufacturer) are drawn from the sample tested.

A Car Manufacturer Stated in Its Advertising That the Gas