The correct answer for each question is indicated by a .

1

Educational researchers ultimately want the answer to a research question to pertain to the

A)

sample.

B)

accessible population.

C)

target population.

D)

world.

2

When every member of the accessible population has an equal chance of being selected to participate in the study, the researcher is using

A)

simple random sampling.

B)

stratified random sampling.

C)

convenience sampling.

D)

purposive sampling.

3

If a researcher selected five schools at random and then interviewed each of the teachers in those five schools, the researcher used

A)

simple random sampling.

B)

stratified random sampling.

C)

cluster random sampling.

D)

two-stage random sampling.

4

Which of the following is an example of a random sampling method?

A)

systematic sampling

B)

convenience sampling

C)

purposive sampling

D)

cluster random

5

The best sample is one that is

A)

a systematic sample.

B)

convenient.

C)

representative of the population.

D)

purposefully selected.

6

Suppose that a researcher conducted a study of student morale in a middle school. The researcher wanted to generalize the results to all middle school students in the district. Under which of the following conditions would ecological generalizability have been threatened?

A)

The school is located in a wealthy neighborhood.

B)

The school is an all-girls school.

C)

The school is a private school.

D)

This is the first year in a new school building.

7

Questions 7 to 9 refer to the following research situation:
A researcher who wanted to determine the benefits of using a new beginning algebra study technique obtained permission from a school district to select 50 high school students. The researcher selected 50 beginning algebra students at random. The researcher selected 25 of these 50 students to participate in the new study program. The researcher gave a training session on traditional study techniques to the other 25 students and asked them to use these methods.
The most likely target population in this study is

A)

algebra students in the district.

B)

all students in the district.

C)

all algebra students.

D)

the 25 students who learned the new study techniques.

8

The method of sampling used in the study is

A)

simple random sampling.

B)

stratified random sampling.

C)

cluster sampling.

D)

convenience sampling.

9

The greatest threat to external validity in this study is

A)

the division of the sample into two groups of 25.

B)

the use of only 50 students in the sample.

C)

the use of students from only one district.

D)

the use of only two different study techniques.

10

Which of the following is not an example of a random sampling method?

A)

systematic sampling

B)

stratified random sampling

C)

simple random sampling

D)

cluster random

11

Which of the following is an example of a random sampling method?

A)

purposive sampling

B)

two-stage random sampling

C)

systematic sampling

D)

convenience sampling

12

Which of the following is an example of a nonrandom sampling method?

A)

convenience sampling

B)

stratified random sampling

C)

simple random

D)

cluster random

13

The purpose of stratified random sampling is to make certain that

A)

every member of the population has an equal chance of being selected for the sample.

B)

the sample proportionately represents individuals from different categories of the population.

C)

the participants chosen for the study are the ones most likely to react to the treatment.

D)

the sample is more representative of the target population than the accessible population.

14

Population generalizability refers to

A)

conclusions researchers make about a random sample.

B)

conclusions researchers make about information uncovered in research study.

C)

the degree to which a sample represents the population of interest.

D)

the degree to which results of a study can be extended to other settings or conditions.

15

The degree to which results of a study can be extended to other settings or conditions describes

A)

population generalizability.

B)

conclusions researchers make about a random sample.

C)

conclusions researchers make about information uncovered in research study.

D)

ecological generalizability.

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