Exam 13: Basic Sampling Issues

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The key to making accurate predictions about the characteristics or behavior of a large population on the basis of a relatively small sample lies in the way in which individuals are selected for the sample.

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Distinguish between probability and nonprobability samples.What are the advantages and disadvantages of each?

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In a ___________,data are obtained from or about every member of the population of interest,while in a ______________,information is obtained from or about a part of the population and used to make estimates about various characteristics of the total population.

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Which of the following types of samples enables the researcher to compute sampling error?

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Which of the following is a nonprobability sample in which quotas,based on demographic or classification factors selected by the researcher,are established for population subgroups?

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Which of the following sampling methods is the most statistically efficient (the most representative)?

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A judgment sample enables the researcher to make statistical inferences about population values.

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Proportional allocation is also referred to as optimal allocation.

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A researcher randomly selected 10 census tracts from a metropolitan area.Within each census tract,30 households were randomly selected.The sampling technique just described would be a ______________.

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The final step in the sampling process is execution of the operational sampling plan.

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Which of the following sample types is often used as a substitute for simple random sampling?

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If a researcher offers beer drinkers an extra incentive to recruit their friends who also drink beer to participate in the study,s/he is using a(n)________sample.

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Nonprobability samples cost less than probability samples.

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In order to compute a skip interval,the researcher needs to know the desired sample size and the __________.

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The _____________ is a list of the members or elements from which units to be sampled are selected.

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Which of the following is an advantage to internet sampling?

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A shortcoming of Internet surveys relative to other modes of data collection is the need to input the data into a database after it has been collected.

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Ideal census conditions are seldom available,even when the population is very small.

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