The square of the standard deviation and another measure of a distribution’s spread or dispersion is called variance
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True
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Unbiased estimate is a conservative estimate of a population parameter.
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True
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The average deviation for all scores from the mean of a distribution, calculated as the sum of the absolute value of the scores’ deviations from the mean divided by the number of scores is called
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Mean deviation
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The average amount of variability in a set of scores or the scores’ average deviation from the mean is called
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Standard deviation
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____ is a gross measure of variability.
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Range
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How much scores differ from one another or, put another way, the amount of spread or dispersion in a set of scores is called
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Variability
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The standard deviation is ______.
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The square root of the average squared deviation from the mean
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What are the three tools used to assess variability?
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Range, standard deviation, and variance
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When we square the difference scores when calculating a measure of variability, we are using the ______.
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Standard deviation
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When calculated on the same distribution of scores, the average deviation will be ______ the standard deviation.
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Less than
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In order to calculate the variance, which of the following must you know?
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Mean
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What is another term for variability?
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Spread of dispersion
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Which of the following is not a measure of variability?
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Mean
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When we take the absolute value of the difference scores when calculating a measure of variability, we are using the ______.
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Average deviation
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The symbol σ represents the standard deviation for ______.
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A population
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The symbol S represents the standard deviation for ______.
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A sample
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The symbol s represents the standard deviation for ______.
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The unbiased estimator of the population standard deviation
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The range is ______.
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The difference between the lowest and highest scores in the distribution
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The calculation of the average deviation differs from the calculation of the standard deviation in that the difference scores are ______.
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Converted to absolute values
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Imagine that distribution A contains the following scores: 3, 4, 5, 6, 7. Imagine that distribution B contains the following scores: 1, 3, 5, 8, 10. Distribution A has a ______ standard deviation and a ______ average deviation in comparison to distribution B.
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Smaller; smaller
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Which of the following measures scores differ from each other?
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Variability
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