In comparing differences in ratings of responsibility for an automobile accident between male and female drivers,the null hypothesis would be
A) men drive better than women.
B) there is no difference in ratings of responsibility between male and female drivers.
C) men are more responsible drivers than women.
D) there is a difference in ratings of responsibility between male and female drivers.

Question

Quizplus · Accepted Answer

The null hypothesis in this case should always be that there is no difference between male and female drivers in relation to responsibility for an automobile accident. This is because the aim of the study is to investigate whether there is a significant difference between the two groups based on the ratings of responsibility. Therefore, options A, C, and D are incorrect as they all suggest that there is either a superiority or inferiority in one group over the other. The null hypothesis should always be non-directional and state that no difference exists between the groups being compared.

In Comparing Differences in Ratings of Responsibility for an Automobile