Exam 13: Sampling Designs and Data Sources for Effect Evaluations

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What is the main reason low response rates are of concern?

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Low response rates result in potentially nonrepresentativeness of the sample.

Effect size and power are the same.

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Write the basic formula for calculating a response rate from a survey using a questionnaire.

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(Number of useable questionnaires/number questionnaires distributed) x 100

Is accomplishment of client goals a reliable data source?

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List two ways to calculate an effect size.

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For each of the following, indicate whether it relates to nonresponse bias or response bias. A) Social desirability B) Attrition C) Response set pattern D) Hard-to-reach

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How does purposive sampling differ from random sampling?

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Calculate a response rate using the following information. Out of 600 questionnaires assessing alcohol consumption sent out to the junior class at Layetteville High School, 450 were returned; 10 had responses marked only on the front pages (the back pages were omitted); and 10 were returned blank.

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What alternative term has been suggested recently for hard-to-reach? Why?

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The technique to collect data is called methods, and the overall plan for when and from whom data are collected is called ____________.

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