The null hypothesis which is appropriate for a directional alternative hypothesis asserts that _________.
A) the independent variable has had no effect
B) chance alone is responsible for the differences between conditions
C) the independent variable does not have an effect in the direction predicted by H 1
D) b and c

Question

Quizplus · Accepted Answer

A directional alternative hypothesis makes a prediction about the direction of the effect. Therefore, the appropriate null hypothesis would be that the independent variable does not have an effect in the direction predicted by H1. Option A refers to a non-directional alternative hypothesis, while B refers to a general null hypothesis. Option D is incorrect because while option B is partially correct, option C is the more appropriate choice.

The Null Hypothesis Which Is Appropriate for a Directional Alternative