Which of the following is an example of a null hypothesis?
A) This industrial process makes windshields with an average length of 33 inches.
B) The average quantity of detergent put into a box by this filling machine is not 1 pound.
C) This shipping company's average delivery time is different from 3 days.
D) The thickness of aluminum sheets averages is not .03 inches, as required.
E) The average quantity of detergent put into a box by this filling machine is not 1 pound and this shipping company's average delivery time is different from 3 days.

Question

Quizplus · Accepted Answer

A null hypothesis typically states that there is no effect or no difference, and it is usually formulated in terms of equality. Choice A, stating that the industrial process makes windshields with an average length of 33 inches, is an example of a null hypothesis because it specifies a precise value without indicating a direction of difference.

Which of the Following Is an Example of a Null