Question

A statistics class was given a pretest on probability (since many had previous experience in some other class). Then the class was given a six-page review handout to study for two days. At the next class they were given another test. Is there sufficient evidence that the scores improved?

Answer 1

No, there is not sufficient evidence that the scores improved.

Explanation:

Just because these people were given a six-page review handout doesn't mean that:

a. They actually did any of it

b. They learned anything

c. Since the kids have other experiences in class, the scores might not have necessarily improved that much, if at all

d. They had enough time to study

e. They cared enough in the first place

Generally, there is no rock-solid evidence at all pointing to the fact that their test scores improved. While you could make the assumption assuming every kid did what they were supposed to do, there isn't enough evidence to say that the scores improved.