Suppose you wish to test whether mean attitudes towards an advertisement are higher than some set value (for example, 4) on a 7-point scale. The null hypothesis should be written as:
A) Ho: µ = 4.
B) Ho: µ = 7.
C) Ho: µ 4.
D) Ho: µ = 0.

Question

Suppose you wish to test whether mean attitudes towards an advertisement are higher than some set value (for example, 4) on a 7-point scale. The null hypothesis should be written as:
A) Ho: µ = 4.
B) Ho: µ = 7.
C) Ho: µ > 4.
D) Ho: µ = 0.

Quizplus · Accepted Answer

The null hypothesis should always be written as the hypothesis of no effect, which means that there is no difference between the mean value and the set value. Therefore, the null hypothesis in this case should be that the mean attitudes towards the advertisement are equal to the set value of 4.

Suppose You Wish to Test Whether Mean Attitudes Towards an Advertisement