Which of the following would be an appropriate null hypothesis?
A) The mean of a population is equal to 55.
B) The mean of a sample is equal to 55.
C) The mean of a population is greater than 55.
D) Only A and C are appropriate.

Question

Quizplus · Accepted Answer

The null hypothesis should always be a statement of no difference or no effect. Option A states that the mean of a population is equal to a specific value (55), which is a statement of no difference. Option B is not appropriate as it is not a statement about a population parameter. Option C is a statement about a directional (one-tailed) alternative hypothesis, which is not appropriate for the null hypothesis. Therefore, option D is also incorrect.

Which of the Following Would Be an Appropriate Null Hypothesis