Exam 17: Determination of Sample Size: a Review of Statistical Theory

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

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The confidence interval for a proportion uses which of the following formulas?

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The value below which half the values in a distribution fall is the _____.

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

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Which of the following is the symbol for the sample standard deviation?

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Find the approximate standard deviation of the following set of scores: 3, 6, 2, 7, 8 .

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_____ is the long-run relative frequency with which an event will occur.

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If the price of a product ranges from $59 to $179, the range of these prices is _____

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When you add up a set of scores and divide the result by the number of scores, you have determined the ______ of the distribution, which is a measure of central tendency.

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If 35 percent of TV viewers recalled seeing an ad for a Toyota Prius on a particular television program based on a sample of 800 viewers, the 95 percent confidence interval for this study would be between approximately _____.

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The percentage of elements that meet some criterion is referred to as the _____.

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An estimate of the population mean in the form of a single value is called a(n) _____.

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If the population mean is assumed to be 20 and the sample standard deviation is 5, a score of 15 would have a Z-value of _____.

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Percentage frequency is the long-run relative frequency with which an event will occur.

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A specified range of numbers within which a population mean is expected to lie is known as the ______ estimate.

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The primary purpose of inferential statistics is to make a judgment about a population.

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Which theory states that as sample size increases, the distribution of sample means of size n, randomly selected, approaches a normal distribution?

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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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When a data set is summarized by counting the number of times each value for a variable occurs in the sample, this is known as a(n) ______.

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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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