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While giving guidelines to her field interviewing staff, a researcher states, "I want you to interview every tenth customer entering a K-Mart store at the following key sites." This is an example of ____ sampling.


A) judgment
B) quota
C) sequential
D) systematic
E) convenience

F) All of the above
G) B) and D)

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A researcher wants to study the effects of social class on consumption behavior. He establishes three different categories of social class in terms of amount of income. He then assigns each field worker a specified number of interviews with people in each income category although the interviewers are allowed to select who they interview. This is an example of:


A) probability sampling.
B) stratified sampling.
C) systematic sampling.
D) quota sampling.
E) random sampling.

F) C) and D)
G) D) and E)

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The distinguishing feature of nonprobability sampling plans is that:


A) they allow an assessment of sampling error.
B) they are not as representative of the population as probability samples.
C) they involve personal judgment somewhere in the selection of sample elements.
D) there is only one basic type of nonprobability sample while there are several types of probability samples.
E) they tend to be more expensive than probability samples.

F) C) and D)
G) B) and D)

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The primary advantage of area sampling plans is:


A) area sampling data is easy to tabulate and analyze.
B) they don't require probability-based methods of element selection.
C) results can be generalized from one area to another without loss of statistical efficiency.
D) they don't require a list of elements from the population of interest.
E) the results are more understandable for the general public than other, more complex plans.

F) B) and E)
G) A) and B)

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Which of the following types of probability samples does not require a complete list of population elements by name in order to draw the sample?


A) Stratified sample
B) Systematic sample
C) Simple random sample
D) Cluster sample
E) Quota sample

F) A) and D)
G) A) and C)

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D

One of the major problems with mail surveys is nonresponse bias. In an effort to minimize this, a researcher decides to limit the sample to his personal friends from whom he is sure to get replies. This is an example of a:


A) probability sample.
B) nonprobability sample.
C) random sample.
D) sequential sample.
E) quota sample.

F) C) and E)
G) B) and D)

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Nonprobability sampling is an objective procedure in which the probability of selection for the population units can be determined.

A) True
B) False

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When using area sampling, a researcher should seek a balance between statistical efficiency, which suggests ____, and economic considerations, which suggest ____.


A) the need for accuracy, that benefits be considered
B) a small number of areas be used, few areas be used
C) a large number of areas be used, few areas be used
D) that a small sample size can be used to predict accurately, possible losses due to faulty predictions can be costly
E) that a large number of areas be used, a large number of observations within each area be collected

F) A) and E)
G) A) and C)

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When stratifying the population, the characteristics should be as:


A) close in value as possible within each strata.
B) far apart in value as possible between any two strata.
C) far apart in value as possible within each strata.
D) Both b and c
E) Both a and b.

F) A) and D)
G) B) and C)

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E

Ten volunteers are requested from your class to test a new bicycle. Of these ten, two are selected at random for the actual tests. The sampling frame consists of:


A) the students who were selected for the actual tests.
B) the students who volunteered.
C) all the students in the class.
D) the students who were not selected.
E) all the students in the school.

F) A) and E)
G) A) and B)

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C

Judgment samples are distinguished by the fact that:


A) those entering the sample happen to be where the study is being done when it is being done.
B) the proportion of those possessing a given characteristic is balanced against the proportion of the population possessing the characteristic.
C) each field worker is allowed to judge whether any given respondent would be a good representative of the population.
D) the sample elements are hand picked by the investigator because it is expected they can offer the contributions sought.
E) they are superior to other forms of sampling for descriptive studies.

F) A) and B)
G) All of the above

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The differences between a cluster sample and a stratified sample are in a:


A) cluster sample, the parent population is divided into mutually exclusive and exhaustive subsets.
B) stratified sample, the parent population is divided into mutually exclusive and exhaustive subsets.
C) stratified sample, a simple random sample of elements is chosen independently from each group or subset, while in a cluster sample, a random sample of the subsets is selected.
D) cluster sample, a simple random sample of elements is chosen independently from each group or subset, while in a stratified sample, a random sample of the subsets is selected.
E) None of the above.

F) D) and E)
G) A) and E)

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What three factors are needed to calculate sample size?


A) Variability, precision, and confidence.
B) Variability, precision, and population size.
C) Precision, confidence, and population size.
D) Precision, population size, and costs.
E) None of the above.

F) A) and D)
G) C) and D)

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The advantages of stratified over simple random sampling include stratified sampling:


A) ensures adequate representation from each stratum of interest.
B) can produce more precise sample statistics.
C) allows for the comparison of variables between strata.
D) Both b and c
E) All of the above.

F) A) and B)
G) B) and E)

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Which of the following is NOT a problem with using a phone book for a sampling frame?


A) Unlisted phone numbers.
B) Not all homes have phones.
C) Double counting homes with multiple phone numbers.
D) The phone book is always outdated.
E) All of the above are problems when sampling from phone books.

F) C) and E)
G) All of the above

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Which of the following statements is INCORRECT with respect to a quota sample?


A) It is relatively easy to verify whether the sample is representative.
B) Field workers' personal judgments govern the choice of sample members.
C) The quotas per field worker usually mirror the distribution of characteristics in the population.
D) Quota samples are an example of nonprobability sampling.
E) Both a and c.

F) A) and C)
G) B) and D)

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If a local newspaper reporter tries to gather information about perceptions of a proposed comprehensive "senior exit exam" by interviewing officers from the university's student senate (because they are well informed about the feelings of the general student body) , what type of sampling procedure is he using?


A) Simple random sample
B) Systematic sample
C) Judgment sample
D) Convenience sample
E) Quota sample

F) A) and E)
G) C) and D)

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A(n) ____________________ is a subset of elements from a larger group of objects.

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A researcher wants to be able to assess the amount of "sampling error" associated with an estimate. Which of the following sampling methods would you recommend he use?


A) Convenience
B) Quota
C) Nonprobability
D) Probability
E) Judgment

F) None of the above
G) D) and E)

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In proportionate stratified sampling, after the total sample is allocated, a simple random sample is chosen from each subpopulation to create the total sample.

A) True
B) False

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