Exam 12: Sampling: Final and Initial Sample Size Determination

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Two major nonresponse issues in sampling are improving response rates and adjusting for nonresponse.

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The statistical approach to determining sample size is based on the construction of confidence intervals around sample means or proportions.

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Which equation is the correct equation for determining the initial sample size?

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The confidence level is the probability that a confidence interval will include the population parameter.

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Most refusals occur ________.

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The statistically determined sample size is the net or final sample size-the sample remaining after eliminating potential respondents who do not qualify or who do not complete the interview.

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The door-in-the-face attempt at motivating potential respondents is more effective than foot-in-the-door.

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Which formula would be used to determine the sample size using the formula for the standard error of the proportion?

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The statistically determined sample size is the net or ________.

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When using the confidence interval approach to sample size determination, if the statistic of interest is a proportion, rather than a mean, the approach to sample size determination is very different.

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When using the confidence interval approach to sample size determination, in some cases, precision is specified in relative rather than absolute terms. In other words, it may be specified that the estimate be within plus or minus R percentage points of the mean.

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