Exam 9: Selecting the Sample

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Sampling error is caused by two factors,which include the sample definition and the sampling technique.

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In river samples,the"river"is the steady stream of website visitors,and these invitations figuratively dip respondents out of the Internet river.

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A sample frame is not a master source of sample units in the population.

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The sampling method in which the size of the sample portions is determined by the researcher's belief about the relative size of each class of respondent in the population is:

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Of the following,which is NOT true of nonprobability samples?

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Nonprobability samples are samples where the chances(probability)of selecting members from the population into the sample are known.

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The terms known and unknown are misleading;to calculate a precise probability,one would need to know the exact size of the population,and it is impossible to know the exact size of the population in most marketing research studies.

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Although scientifically sound,systematic sampling does not accomplish the same end as simple random sampling,and is less efficient.

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Managers tend to have a ________ definition of the population than do researchers.

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In ________,the selection of the place and,consequently,prospective respondents is subjective rather than objective.

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The use of banners,pop-ups,or other online devices that invite website visitors to take part in the survey are indicative of what type of sampling method?

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Cluster sampling is better suited than other probability sampling methods for populations that are not distributed in a bell-shaped pattern.

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To use systematic sampling,it is not necessary to have a complete listing of the population.

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Stratified sampling results in a more accurate overall sample by allowing for explicit analysis of each stratum and by allowing the estimation of the overall sample mean by use of a weighted measure.

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Whenever a sample is taken,the survey will reflect sampling error.

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Computer programs can be designed to generate numbers without any systematic sequence to the numbers whatsoever.This describes the random numbers method.

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Systematic sampling can be applied with less difficulty and accomplished in a shorter time than can simple random sampling

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Creating a precise description of the group under investigation using demographics,buyer behavior,or other relevant constructs is the first step in creating a sample plan.

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Convenience samples can be seriously misleading since with nonprobability sampling,there is a good possibility that non-representative sample units will be selected.

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With a nonprobability sample,the researcher has some savings in cost and/or time but at the expense of using a sample that is not truly representative of the population.

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