Exam 12: Sampling: Final and Initial Sample Size Determination

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Assuming no measurement error,the reliability of an estimate of a population parameter can be assessed in terms of its standard error.

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By inflating the standard deviation,it is possible to increase the sample size and thus the project revenue for the research firm.

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Prior notification increases response rates for samples of the general public because it reduces surprise and uncertainty and creates a more cooperative atmosphere.

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The sampling distribution of the mean is a binomial distribution.

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The rate of occurrence of persons eligible to participate in the study expressed as a percentage is the ________.

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The equation for a 95% confidence interval is: ________.

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Which method of improving response rate involves offering potential respondents monetary and non-monetary gifts?

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When determining the sample size,the standard deviation may not be known.Which of the following was not mentioned in your text as a way to estimate the standard deviation?

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Discuss four of the methods of reducing refusals to participate in a survey.

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When conducting marketing research in foreign countries,statistical estimation of sample size may be difficult as estimates of the population mean may be unavailable.

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Trend analysis is an attempt to discern a trend between early and late respondents.

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The z value for a point is the number of standard deviations a point is away from the mean.

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Discuss why there may be ethical concerns when using the standard deviation of a variable in determining sample size.

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A ________ is a summary description of a fixed characteristic or measure of the target population.It denotes the true value that would be obtained if a census rather than a sample was undertaken.

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When determining the sample size,if the population standard deviation,s,is unknown and an estimate is used,the standard deviation should be re-estimated once the sample has been drawn.Next a revised confidence interval should be calculated to determine the precision level actually obtained.

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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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The ________ for a point is the number of standard errors a point is away from the mean.

(Multiple Choice)
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Which method of improving response rate involves sending potential respondents a postcard or letter to remind nonrespondents to complete and return the questionnaire?

(Multiple Choice)
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Most refusals occur ________.

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Which method of adjusting for nonresponse involves evaluating the likely effects of nonresponse based on experience and available information?

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