# Multiple choice questions on design of experiments

For an independent-measures experiment comparing two treatment conditions with a sample of n = 10 in each treatment, the F-ratio would have df equal to __________.

18

19

1, 18

1, 19

A researcher reports an F-ratio with df = 3, 36 for an independent-measures experiment. How many treatment conditions were compared in this experiment?

3

4

36

39

A research report concludes that there are significant differences among treatments, with "F(2,27) = 8.62, p < .01." How many treatment conditions were compared in this study?

2

3

29

30

A research study compares three treatments with n = 5 in each treatment. If the SS values for the three treatments are 25, 20, and 15, then the analysis of variance would produce SS within equal to __________.

12

20

60

cannot be determined from the information given

In the F-ratio for a repeated-measures ANOVA, variability due to individual differences __________.

is automatically eliminated from the numerator but must be computed and subtracted out of the denominator

is automatically eliminated from the denominator but must be computed and subtracted out of the numerator

is automatically eliminated from both the numerator and the denominator

must be computed and subtracted out of the numerator and the denominator

A repeated-measures study uses a sample of n = 8 participants to evaluate the mean differences among three treatment conditions. In the analysis of variance for this study, what is the value for df total?

2

7

21

23

A repeated-measures analysis of variance with a sample of n = 8 participants, produces df within treatments = 14. What is the value for df error for this analysis?

6

7

21

cannot determine without additional information

Which of the following are sources of variability that contribute to SS between treatments in a repeated ANOVA?

treatment effect and chance/error

treatment effect and individual differences

treatment effect, individual differences, and chance/error

individual differences and chance/error

The results of a repeated-measures ANOVA are reported as follows, F(3, 27) = 1.12, p > .05. How many subjects participated in the study?

40

36

10

9

A two-factor study with two levels of factor A and three levels of factor B uses a separate sample of n = 5 participants in each treatment condition. How many participants are needed for the entire study?

5

10

25

30

The results of a two-factor analysis of variance produce df = 2, 24 for the F-ratio for fac-tor A. Based on this information, how many levels of factor A were compared in the study?

2

3

24

25

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#### Solution Summary

Multiple type questions in the field of Design of Experiments

Sample Research Questionnaire/Quiz

Research may be used as a diagnostic tool to provide information about what is happening in the environment.

Researchers who have strong opinions about the subject of a study are likely to do a better job of conducting the research.

When a decision must be made about a specific real-life problem, we would conduct ____ research.

Experiments hold the greatest potential for establishing cause-and-effect relationships.

Which of the following statements concerning research design is true?

A. Research design provides a framework that guides data collection.

B. Ideal research design is determined by the research objectives.

C. Research design characteristics are indirectly determined by the information needs of the decision maker.

D. All of the statements are true.

According to the textbook, which of the following is least likely to be considered unethical?

A. A telemarketer selling carpeting begins the telephone sales call by saying he or she is conducting a survey about carpeting.

B. A researcher does not tell his or her client that the sampling procedure in the proposal was considered too expensive, so an alternative sampling technique was used.

C. Researchers do not tell respondents to a survey sponsoring the survey; that is they maintain a discreet silence about the sponsor of a survey by avoiding the issue.

D. The researcher who identifies the most likely prospects for a new photocopying machine passes the names of these people to the sales manager. .

Which of the following is not a common problem with secondary data?

A. outdated information

B. variation in definition of terms

C. differing units of measurement

D. takes too long to collect

E. All of the above are common problems. .

High-cost, low standardization of questioning and limited geographic dispersion are disadvantages characteristic of ______ surveys.

A. telephone

B. personal interview

C. mail

D. none of the above. .

A hypothesis is a statement of fact about the nature of the world.

Speed of data collection, lower costs, and convenience are the major advantages of quota sampling.

Decisions must be made about several basic elements of an experiment. One of these issues is

A. selection and measurement of the dependent variable.

B. manipulation of the extraneous variable(s).

C. control over the dependent variable.

D. selection of assignment of extraneous variables.

E. all of the above.

A measurement task that requires respondents to estimate the magnitude of a characteristic or quality that a brand, store, or object possesses is known as

A. ranking

B. rating

C. sorting

D. a choice technique

"Hertz is #1, Avis is #2" implies _____ data.

A. nominal

B. ordinal

C. interval

D. ratio

E. The statement implies nothing about data.

The extent to which a measurement is free from random error is a measurement of

A. validity.

B. reliability.

C. predictive accuracy.

D. degrees of freedom.

E. systematic validation.

The order of questions in a survey is a potential source of bias. Before a questionnaire can be constructed, the researcher must consider

A. the analytical techniques and data analysis to be used.

B. the communication medium of data collection.

C. the type of information needed.

D. all of the above.

E. none of the above.

Consider the following question: "If you own your own home, what is its approximate value?" a) $30,000 - 50,000; b) $50,000 - 70,000; c) $70,000 - 100,000; d) $100,000 - 140,000

Which of the following is not a valid criticism?

A. Categories are not mutually exclusive.

B. List of alternatives is not collectively exhaustive.

C. Two questions are being asked as one.

D. All are valid criticisms.

When a researcher limits a sample to a group of his or her personal friends in order to minimize non-response error, the sample is referred to as ______________ sample

Which of the following sample types would allow a researcher to assess the degree of random sampling error most accurately?

A. convenience

B. judgment

C quota

D. snowball

E. stratified

EXTRA CREDIT (1/2 pt each):

1. The following question: Should Macy's continue its excellent gift wrapping program? Yes No

A. is a double-barreled question.

B. has a built-in assumption.

C. is a counterbiasing statement.

D. all of the above.

2. The concept of "demand characteristics" refers to aspects of an experiment that provide _______________________ about the experimenter's hypothesis.

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