Exam 13: Reviewing Statistical Theory and Determining Sample Size

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Explain the central-limit theorem and discuss why it is useful to marketing researchers.

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A researcher must calculate the population mean to calculate the confidence intervals.

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A common practice in marketing research is to use the 75 percent confidence interval about the mean in research studies.

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The formula below is used to calculate the ______ . (ZS/E)²

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Which of the following eliminates the drawback of having the measure of dispersion in squared units rather than in the original measurement units?

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A top-box score refers to the top quartile of responses.

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Hank has developed a set of data organized by summarizing the values resulting from rolling a pair of die.He constructed a table of his data and found that five was the most common result.This is an example of a _____.

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The variance,or heterogeneity,of the population refers to the standard deviation of the population.

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In most cases,the size of the population does not have a major effect on the sample size.

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Find the mode of the following scores: 1,2,3,4,5,5,7

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The formula below is used to calculate the _______ . The formula below is used to calculate the _______ .

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The mode is the measure of central tendency that identifies the value that occurs most often.

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One hundred percent of the scores in a normal distribution fall within plus or minus two standard deviations of the mean.

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If between 125 and 150 units of a product have been produced each day during the past month,the range of this production is 150 units.

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The standardized normal distribution has a mean of 1.0 and a standard deviation of zero.

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Which of the following is a step in determining sample size?

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The average deviation score is frequently used in marketing research studies.

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The mean is simply the arithmetic average.

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Traditionally,market researchers have used the ______ percent confidence level in research studies.

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The confidence interval increases as the sample size,n,increases.

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