Quiz 2: Chapters 7-9

Chapter 7

Multiple-Choice Questions

1. What does a hypothesis help you determine?

a. Statisitcal techniques to be used

b. Research question

c. Average score

d. Sampling error

2. Which of the following refers to the group to which you wish to generalize your results? e. Sample

f. Population

g. Sampling error population

h. General group

3. What does “generalizability” mean?

i. Results may be applied to the populations studied

j. Results may apply only to the sample studied

k. Sampling error is high

l. Sample does not represent the population

4. The group from which you actually collect data for your study is known as the __________. m. sample

n. population

o. sampling error

p. general group

5. Which of the following provides you with a measure of how well your sample approximates the population? q. Generalizability

r. Population

s. Sampling error

t. Hypothesis

6. In order to help ensure generalizability, which of the following should be true about your sample? u. It is large

v. It is small

w. It is representative

x. It is nonrepresentative

7. Which of the following represents a null hypothesis?

y. H1: X1 > X2

z. H0: 1 = 2

{. H1: X1 = X2

|. H0: 1 > 2

8. Which of the following represents a directional research hypothesis? }. H1: X1 > X2

~. H0: 1 = 2

. H1: X1 = X2

. H0: 1 > 2

9. Which of the following represents a nondirectional research hypothesis? . H1: X1 > X2

. H0: 1 = 2

. H1: X1 = X2

. H0: 1 > 2

10. What test would you want to use to test a nondirectional research hypothesis? . One-tailed test

. Two-tailed test

. Nonparametric test

. Frequency test

11. What test would you want to use to test a directional research hypothesis? . One-tailed test

. Two-tailed test

. Nonparametric test

. Frequency test

12. What type of hypothesis posits a difference between groups where the difference is specified? . Directional hypothesis

. Nondirectional hypothesis

. Research hypothesis

. Null hypothesis

13. Which of the following symbols represents the null hypothesis? . H1

. 1

. X1

. H0

14. Which of the following symbols represents the first research hypothesis? . H1

. 1

. X1

. H0

15. Which of the following symbols represents the theoretical average of the population for Group 1? . H1

. 1

. X1

. H0

16. Which of the following symbols represents the average score of Group 1? . H1

. 1

. X1

. H0

True/False

1. The null hypothesis is always stated in terms of the population? True 2. The research hypothesis is the same as the null hypothesis? False 3. The null hypothesis means that there is no difference between the two populations you are testing? True 4. The research hypothesis is always directional. False

5. If a researcher accepts the null hypothesis he or she has failed in their work. False Short Answer

1. What is a hypothesis? An educated guess. Reflection of the problem statement that was the motivation for asking the research question. 2. Explain the difference between the null hypothesis and a research hypothesis and give an example both using a sentence and the notation of each. Null-No relationship between variables (equality). “There will be no difference in the average score of the 9th graders and the average score of the 12th graders on the ABC memory test.” Research-Definite statement that there is a relationship between variables(inequality). “The average score of 9th graders is different from the average score of the 12th graders on the ABC memore test.” 3. What...