Which of the following is an expression of a null hypothesis?
A) Group 1 will score significantly better than Group 2.
B) There will be a significant difference between Group 1 and Group 2.
C) Groups 1 and 2 will differ significantly from Group 3 but not from each other.
D) Groups 1 and 2 will score the same.

Question

Quizplus · Accepted Answer

Choice D is an expression of a null hypothesis because it states that there will be no significant difference between Groups 1 and 2. This is the statement that will be tested against the alternative hypothesis, which would state that there is a significant difference between Groups 1 and 2. Choices A, B, and C are all expressions of alternative hypotheses, because they all predict that there will be a significant difference between at least two of the groups being compared.

Which of the Following Is an Expression of a Null