Which statement is NOT true about a null hypothesis?
A) The true difference between the means (in the population) is zero
B) There is no true difference between the means
C) The observed difference between the sample means was created by sampling error
D) The girls achieved a higher mean in reading than boys

Question

Quizplus · Accepted Answer

The null hypothesis is a statement that there is no effect or no difference, and it is used as a starting point for statistical testing. Statements A, B, and C are consistent with the concept of a null hypothesis, which generally posits no true difference or effect. Statement D, however, asserts a specific outcome (girls achieving a higher mean in reading than boys), which is not a characteristic of a null hypothesis. A null hypothesis would not specify which group has a higher mean, only that any observed difference could be due to chance.

Which Statement Is NOT True About a Null Hypothesis