If a psychologist tests whether there is any difference between how fast people work in the morning versus how fast they work in the evening,the null hypothesis is that
A)people who work in the morning work faster.
B)people who work at night work faster.
C)there is a difference in worker speed,but no prediction is made.
D)there is no difference in the speed at which people work.

Question

Quizplus · Accepted Answer

The null hypothesis always assumes that there is no significant difference between the groups being compared. Therefore, in this case, the null hypothesis is that there is no difference in the speed at which people work in the morning versus the evening.

If a Psychologist Tests Whether There Is Any Difference Between