Exam 7: Sampling

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If the standard deviation of a statistic X is 4.3 and the sample size is 16,what is the standard error of the sampling distribution for X?

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_______________ sampling involves explicit steps to model a population on some prespecified "control" characteristic,typically demographic.

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If done correctly,stratified sampling can actually decrease the standard error of the estimator by

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One of the disadvantages of the area sampling is that it is limited to one or two stages.

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Some quantity of interest in a specific population is a

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When simple random samples are taken from each strata of a stratified sample based on population proportions,it is called

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In cluster sampling the groups should

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Multistage area sampling is much less statistically efficient than simple random sampling.

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What is the relation of one,two,and three "standard errors" to the percent confidence interval?

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The size of the sample is dramatically more important than the size of the population in almost all statistical calculations in research.

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The first step in setting up a stratified sampling plan is to

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If a quota sample matches the population along known characteristics,then it has been demonstrated to be a valid sample.

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Quota samples are useful in preliminary stages of research.If done with great care,they can provide clear,accurate,and useful information,even if they are likely to be less valid than a probability sample.

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With simple random sampling,each element of the population

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Judgment sampling is superior to convenience sampling because the sampling error of the former can be ascertained.

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