Practice More Questions From: Graded Quiz: Descriptive Statistics
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The formula for finding the z-score for a data value is z = (value – mean)/std.
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What is the formula used to find the z-score for a data value?
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Suppose a dataset has a standard deviation of 2 and a mean of 7. What is the z-score for a data value of 3?
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What is the formula for finding the median of a dataset in a spreadsheet? (Assume that the data is in the cells A1 to A100.)
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What is the formula for finding the standard deviation in a spreadsheet? (Assume that the data is in the cells A1 to A100.)
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What is the formula for finding the mean of a dataset in a spreadsheet? (Assume that the data is in the cells A1 to A100.)
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What is the range for the given dataset? 23, 20, 31, 11, 15, 19
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What is the range for the given dataset? 3, 4, 12, 0, 15, 6, 1
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What is the formula for finding the range of a dataset?
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What is the mode for the following set of numbers? 5, -1, 3, 8, 2, 1, 0
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What is the mode for the following set of numbers? 6, 1, 4, 0, 1, 1, 0
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What is the mode for the following set of numbers? 26, 11, 45, 0, 7, 7, 0
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In a normal distribution, what percentage of data values are found above the mean?
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In a normal distribution, what percentage of data values are found between the mean and one standard deviations below the mean
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In a normal distribution, what percentage of data values are found between one and two standard deviations above the mean?
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What is the median for the given dataset? 1, 3, 7, 5, 3
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What is the median for the given dataset? 19, 42, 33, 15, 21
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What is the median for the given dataset? 1, -2, 3, -1, 2, -3
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True or false: The median is sensitive to outliers.
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True or false: The median is preferred for datasets that have outliers
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True or false: The mean is sensitive to outliers.
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What is the mean of the given set of numbers? -1, 3, 6, 5, -3
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What is the mean of the given set of numbers? 4, 7, 3, 1, 2, 1
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What is the mean of the given set of numbers? 10, 20, 30, -15, -25, -20
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Which of the following is not a use for a measure of variation? I. Data reliabilityII. Summarizing the data in a numberIII. Risk analysisIV. All of these
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How can a marketer use a measure of variation? I. Data reliabilityII. Range targetingIII. Risk analysisIV. All of these
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What does a measure of variation tell you about a dataset? I. How spread out the data isII. Where the center of the data isIII. How large the dataset isIV. All of these
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How might measures of central tendency be useful to a marketer? I. They can identify sales frequencyII. They can identify customer behaviorIII. They can be used to compare different populations
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What do measures of central tendency tell you about a dataset? I. They represent how spread out the data isII. They represent the middle of the datasetIII. They tell you how large the dataset is
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Which of the following is not how a marketer can use a measure of central tendency. I. Identifying sales frequencyII. Predicting customer behaviorIII. Risk analysis
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