Exam 6: Sampling: Theory and Methods

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The difference between stratified random sampling and cluster sampling is that in cluster sampling:

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D

If the estimate of expected population proportion having a desired characteristic based on intuition is 60 percent, the acceptable error is plus or minus 5 percent, and the z-value for a 95 percent level of confidence is 1.96, the needed sample size is approximately:

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B

Nonsampling errors reduce the overall quality of the data regardless of the data collection method.

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True

Which of the following is true of simple random sampling?

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Area sampling is an example of a nonprobability sampling method.

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Distinguish between sampling error and nonsampling error.

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Since quota sampling is a nonprobability sampling method, the representativeness of the sample can be measured.

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Customer lists from credit card companies are a common source of sampling frames.

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Briefly discuss optimal allocation sampling and multisource sampling.

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Which of the following is true of convenience sampling?

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In the context of nonprobability sampling methods, judgment sampling is also known as purposive sampling.

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In cluster sampling, each cluster is assumed to be representative of the heterogeneity of a target population.

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Which of the following is a probability sampling method?

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In any sampling plan, the first task of a researcher is to choose a method of data collection.

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_____ sampling is a probability sampling procedure in which every sampling unit has a known and equal chance of being selected.

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Which of the following is true of cluster sampling?

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Jamie Nelson works for a telephone company. She is interested in determining the satisfaction of the customers with the service provided by the company (for landline customers only). She decides to collect data from the customers listed in the company's existing customer directory. In this scenario, the customer directory serves as a(n) _____.

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A benefit associated with detecting sampling error is that it can be determined before a sample is drawn and data collection is completed.

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Which of the following is true of probability sample sizes?

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In the context of the factors that play an important role in determining sample sizes with probability designs, _____ is the acceptable amount of error in a sample estimate.

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