Statistics For People Who Think They Hate Statistics 3rd Edition By Salkind – Test Bank

CHAPTER 11

t(ea) for Two (Again): Tests Between the Means of Related Groups

 

Part I. Multiple-Choice Questions (20 items)

1. Examining one group of subjects under two different conditions would require what statistical technique?
2. Regression
3. t test for dependent samples
4. Analysis of variance
5. t test for independent samples

Ans: d

 

 

 

2. When comparing two groups the term independent explains that:
3. One group is compared to other similar groups
4. One group is compared to dissimilar groups
5. Two groups are related
6. Two groups are not related in any way

Ans: d

 

 

 

3. In the formula that computes a t value, what does nSD represent?
4. Sum of the difference between groups
5. Sum of the means for Group 1
6. Sum of the means for Group 2
7. Sum of the differences squared

Ans: b

 

 

 

4. In a t test for dependent samples that examine the difference between a pretest and posttest, what type of hypothesis is used?
5. Nondirectional
6. Directional
7. Null
8. Research

Ans: c

 

 

 

5. In order to be 99% confident you have not committed a Type I error, at what level should you set your p value?
6. .01
7. .10
8. .05
9. .15

Ans: d

 

 

 

6. In order to compute the test statistic or t value, you must first approximate the sample size through calculating which of the following?
7. Pooled variance
8. Standard deviation
9. Degrees of freedom
10. Mean score

Ans: c

 

 

 

7. What is the test statistic calculated by the statistical procedure selected known as?
8. Critical value
9. Significance level
10. Obtained value
11. p value

Ans: c

 

 

 

8. To determine whether you will reject the null hypothesis, the test statistic must be compared against the:
9. Critical value
10. Significance level
11. Obtained value
12. p value

Ans: b

 

 

 

9. If the obtained value is greater than the critical value, what should you do?
10. Reject the null hypothesis
11. Accept the null hypothesis
12. Set a higher p value
13. Increase your sample

Ans: a

 

 

 

10. If the obtained value is less than the critical value, what should you do?
11. Reject the null hypothesis
12. Accept the null hypothesis
13. Reduce the p value
14. Decrease your sample

Ans: c

 

 

 

11. What is the formula used to calculate degrees of freedom for a t test for dependent groups?
12. n₁ – 1
13. n₁ + n₂ – 1
14. n₁ – 1 + n₂
15. n₁ + n₂

Ans: a