Question 1

The measure of central tendency that is most effected by outliers is the

Accepted Answer

A)   mean.
B)   median.
C)   mode.
D)   variance.E) B) and C)
F) All of the above A

Question 2

The entire group of people the researcher is interested in learning about is known as the __________, whereas the group of people that actually participate in the research is known as the __________.

Accepted Answer

A)   population; sample
B)   sample; population
C)   sampling frame; population
D)   population; sampling frameE) All of the above
F) A) and B)

Question 3

An employer is interested in learning about the employees in his company. He interviews each of his employees, one at a time, using a short interview. He has conducted which of the following?

Accepted Answer

A)   A stratified sample
B)   A cluster sample
C)   A census
D)   A focus groupE) A) and B)
F) A) and C)

Question 4

Which of the following is a primary goal of descriptive research?

Accepted Answer

A)   Testing a research hypothesis
B)   Providing a snapshot of the current state of affairs
C)   Collecting information about changes in individuals over time
D)   Measuring relationships between variablesE) C) and D)
F) B) and D)

Question 5

A telephone book from a large city could be considered

Accepted Answer

A)   a sampling frame.
B)   a simple random sample.
C)   a systematic random sample.
D)   a stratified random sample.E) A) and C)
F) B) and C)

Question 6

The margin of error is most closely related to which of the following statistics?

Accepted Answer

A)   The range
B)   The population probability of error
C)   The confidence interval
D)   The standard deviationE) C) and D)
F) None of the above

Question 7

Which of the following is NOT a measure of dispersion?

Accepted Answer

A)   The median
B)   The range
C)   The standard deviation
D)   The varianceE) A) and B)
F) A) and C)

Question 8

Which of the following is true about using a mean drawn from a simple random sample to estimate a population mean?

Accepted Answer

A)   The size of the sample has a bigger influence than the size of the population on how accurately the sample describes the population.
B)   The size of the population has a bigger influence than the size of the sample on how accurately the sample describes the population.
C)   The results will usually be accurate if the population is large.
D)   The results will usually be accurate even if the population is small.E) B) and D)
F) None of the above

Question 9

Which of the following refers to numbers that summarize the pattern of scores observed on a measured variable?

Accepted Answer

A)   Central tendencies
B)   Normal distributions
C)   Descriptive statistics
D)   Frequency distributionsE) A) and B)
F) A) and C)

Question 10

Which of the following is a graphic display of the frequency distribution of a nominal variable?

Accepted Answer

A)   A histogram
B)   A bar chart
C)   A frequency curve
D)   An outlier plotE) All of the above
F) A) and B) B

Question 11

In comparison to interviews, questionnaires are

Accepted Answer

A)   less likely to be influenced by the presence of the researcher.
B)   less likely to produce valid results.
C)   more likely to result in complete raw data.
D)   more time consuming.E) A) and B)
F) B) and D)

Question 12

A university needs to create a sample of students to interview about their perceptions of the campus climate. They find a computerized list of all of the currently registered students and choose every fiftieth name on the list. What sampling method has been used?

Accepted Answer

A)   Stratified sampling
B)   Simple random sampling
C)   Convenience sampling
D)   Systematic random samplingE) B) and D)
F) C) and D)

Question 13

A statistical table that indicates how many individuals in the sample fall into each set of categories on a quantitative variable is a

Accepted Answer

A)   frequency distribution.
B)   bar chart.
C)   normal distribution.
D)   grouped frequency distribution.E) All of the above
F) B) and D)

Question 14

A researcher selects a sample by taking every sixtieth name on the list beginning with the number 3 . What type of sampling is this?

Accepted Answer

A)   Simple random sampling
B)   Systematic random sampling
C)   Stratified sampling
D)   Cluster samplingE) A) and B)
F) None of the above

Question 15

Which of the following is a potential limitation of using probability sampling to predict a population attitude?

Accepted Answer

A)   People may change their attitudes on important topics after the sample is collected.
B)   Random samples are generally poor predictors of population characteristics.
C)   The population has greater variability than does the sample.
D)   Probability samples tend to have extremely high standard deviations.E) All of the above
F) A) and B)

Question 16

When the response rate on a questionnaire is low,

Accepted Answer

A)   the conclusions drawn about the population may be incorrect.
B)   the data are easier to analyze.
C)   fewer questions should be placed on the questionnaire.
D)   more questions should be placed on the questionnaire.E) A) and B)
F) B) and C)

Question 17

Oversampling refers to

Accepted Answer

A)   choosing individuals from strata in order to provide large enough samples for analysis.
B)   choosing more individuals to be in the sample than is statistically necessary.
C)   overestimating the weight of one sample on the population.
D)   a technique used to control for nonprobability sampling.E) All of the above
F) None of the above

Question 18

Which descriptive statistic would best portray the central tendency of the following distribution (1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 1000) ?

Accepted Answer

A)   The median
B)   The mode
C)   The variance
D)   The meanE) None of the above
F) All of the above

Question 19

Sampling bias occurs when

Accepted Answer

A)   not enough participants are used.
B)   the sample is taken out of context.
C)   the sample is representative of the population.
D)   the probability with which the members of the population have been selected is not known.E) C) and D)
F) B) and D) D

Question 20

An instructor has collected data about the majors of each of the students in her class. Which of the following will be the best method of presenting these data?

Accepted Answer

A)   A mean
B)   A stem and leaf plot
C)   A variance
D)   A standard deviationE) A) and B)
F) All of the above

Exam 6: Surveys and Sampling

The measure of central tendency that is most effected by outliers is the

Correct AnswerverifiedA

The entire group of people the researcher is interested in learning about is known as the __________, whereas the group of people that actually participate in the research is known as the __________.

Correct AnswerverifiedShow Answer

An employer is interested in learning about the employees in his company. He interviews each of his employees, one at a time, using a short interview. He has conducted which of the following?

Correct AnswerverifiedShow Answer

Which of the following is a primary goal of descriptive research?

Correct AnswerverifiedShow Answer

A telephone book from a large city could be considered

Correct AnswerverifiedShow Answer

The margin of error is most closely related to which of the following statistics?

Correct AnswerverifiedShow Answer

Which of the following is NOT a measure of dispersion?

Correct AnswerverifiedShow Answer

Which of the following is true about using a mean drawn from a simple random sample to estimate a population mean?

Correct AnswerverifiedShow Answer

Which of the following refers to numbers that summarize the pattern of scores observed on a measured variable?

Correct AnswerverifiedShow Answer

Which of the following is a graphic display of the frequency distribution of a nominal variable?

Correct AnswerverifiedB

In comparison to interviews, questionnaires are

Correct AnswerverifiedShow Answer

A university needs to create a sample of students to interview about their perceptions of the campus climate. They find a computerized list of all of the currently registered students and choose every fiftieth name on the list. What sampling method has been used?

Correct AnswerverifiedShow Answer

A statistical table that indicates how many individuals in the sample fall into each set of categories on a quantitative variable is a

Correct AnswerverifiedShow Answer

A researcher selects a sample by taking every sixtieth name on the list beginning with the number 3 . What type of sampling is this?

Correct AnswerverifiedShow Answer

Which of the following is a potential limitation of using probability sampling to predict a population attitude?

Correct AnswerverifiedShow Answer

When the response rate on a questionnaire is low,

Correct AnswerverifiedShow Answer

Oversampling refers to

Correct AnswerverifiedShow Answer

Which descriptive statistic would best portray the central tendency of the following distribution (1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 1000) ?

Correct AnswerverifiedShow Answer

Sampling bias occurs when

Correct AnswerverifiedD

An instructor has collected data about the majors of each of the students in her class. Which of the following will be the best method of presenting these data?

Correct AnswerverifiedShow Answer

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A

The entire group of people the researcher is interested in learning about is known as the , whereas the group of people that actually participate in the research is known as the .

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B

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D

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