Practice More Questions From: Practice Quiz: Measures of Dispersion
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What is the purpose of a measure of variation?
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Measures of variation is an alternative name for measures of central tendency.
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Which of the following are examples of measures of variation? I. RangeII. Standard deviation III. Variance
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What is the range for the following dataset? -7, 1, -3, -2, 4, -1
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What is the range for the following dataset? 2, 3, -5, 8, 0, -2
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Suppose that you are given the following data. Would the range be a reasonable measure of the spread in the data? Why or why not? 2, 1, 5, 10, 6, 45
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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 4 and a mean of 3. What is the z-score for a data value of 6?
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For a normal distribution how many data values should you expect to fall within one standard deviation of the mean?
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For a normal distribution, how many standard deviations from the mean is a good criterion for determining an outlier?
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For a normal distribution how many data values should you expect to fall within two standard deviations of the mean?
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How can a z-score be useful? I. It can help in determining if a data value is high or low in the population.II. It tells you how many standard deviations from the mean a data value is.III. It can be used to determine data outliers
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