Review

All Three Types of T-Test Problems

For each problem, state which test you are using and why you chose it. Then, complete the requested calculations (including effect size and CI) and write the conclusion in words.

A professor believes that she has come up with a great way to prepare students for exams. In order to find out whether students do better on tests after using her new study guide, she gives them all the first test of the quarter with no study guide. Then, the second test is given with the study guide. Data are below. Did the study guide make a difference?

Student	Test 1	Test 2
A	84	85
B	69	73
C	73	79
D	97	99
E	79	82