| score | data point, symbolized by X
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| frequency distribution | distribution in which the scores are ranked from highest to lowest, and the number of times each score occurs (its frequency) is listed beside it
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| frequency | the number of times each scores occurs; symbolized by f
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| continuous variable | variable whose measurement can take an infinite number of values
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| discrete variable | variable capable of assuming only specific values
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| apparent limits | limits of class intervals with gaps between them
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| real limits | limits of scores without gaps between them; constructed by subtracting a half unit from the lower apparent limit and adding a half unit to the upper apparent limit
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| percentage frequencies | frequencies of occurrence presented as percentages of the total sample
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| cumulative frequency distribution | distribution constructed by starting with the distribution's lowest
interval and accumulating frequencies as you ascend
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| cumulative percentage | tells the percentage of scores in an interval plus the percentage of scores below the interval
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| cumulative percentage distribution | frequency distribution in which the percentage frequencies are
accumulated from the lowest score to the highest score
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2003 McGraw-Hill Higher Education