High School students took an ACT Prep Course. Below are their ACT scores before and after the course. Before After18 2122 2221 2519 2325 2623 2319 2120 2520 2616 20Mean = Mean =S = S =S2 = S2 = 1. What is your computed answer? 2. What would be the null hypothesis in this study? 3. What would be the alternate hypothesis? 4. What probability level did you choose and why? 5. Is there a significant difference between the two groups? 6. Interpret your answer. Is the ACT course effective? 7. If you have made an error, would it be a Type I or a Type II error? Explain your answer.
High School students took an ACT Prep Course. Below are their ACT scores before and after the course.
Before After
18 21
22 22
21 25
19 23
25 26
23 23
19 21
20 25
20 26
16 20
Mean = Mean =
S = S =
S2 = S2 =
1. What is your computed answer?
2. What would be the null hypothesis in this study?
3. What would be the alternate hypothesis?
4. What probability level did you choose and why?
5. Is there a significant difference between the two groups?
6. Interpret your answer. Is the ACT course effective?
7. If you have made an error, would it be a Type I or a Type II error? Explain your answer.
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