Question

what is the null hypothesis in a study comparing two teaching methods?
a. the two methods are completely different
b. the first method is better than the second
c. there is no difference in effectiveness between the two methods
d. the second method is better than the first

Explanation:

In hypothesis testing, the null hypothesis ($H_0$) assumes no significant difference. When comparing two teaching methods, it would state no difference in their effectiveness. Options a, b, and d suggest differences (either complete difference or one - method - better - than - the - other), which are not null hypotheses.

Answer:

C. There is no difference in effectiveness between the two methods