Exam 14: Sample Size Determination

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Budget is rarely a consideration when determining sample size.

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In addition to being interested in estimating sampling means,marketing researchers frequently are interested in estimating proportions or percentages.

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A(n)____________ normal distribution is a normal distribution with a mean of zero and a standard deviation of one.

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The results of a sample can be used to generate which of the following concerning the population mean?

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About 68% of the area under a standard normal curve covers one _________.

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Higher levels of confidence generally require:

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Which of the following is not a determinant of sample size for probability samples?

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A researcher wants to know the average number of times per month respondents eat at fast food restaurants.The statistic that s/he is most interested in would be the_________.

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All of the statistical methods for determining sample size in this chapter assume which of the following?

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A researcher wants to estimate a population mean.The level of tolerable sampling error is 0.2 of a purchase occasion,with a confidence level of 95.44%.If the estimated population variance is 5 for the most important question in the study,what is the desired sample size?

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The normal distribution is bell-shaped and has only one mode.

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Online interviewing and Internet panels,along with social-media-driven sampling,have had no impact concerning feasible sample sizes.

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As the level of tolerable error increases in the sample means formula,the sample size required to represent a particular population is:

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A particular normal distribution is not uniquely defined by its mean and standard deviation.

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Statistical power is the probability of making a type II error.

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Holding constant at a 95% level of confidence,if the standard deviation increases,then the sample size required to represent the population in question will be _______.

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Assuming the research objectives of the study can be accomplished,researchers would much prefer to estimate the required sample size using the sample proportion formula rather than the sample means formula.Why?

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The proportional property of a normal distribution provides the basis for the statistical inferences.

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