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categorical
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Describing the qualitative categories of a characteristic, for example different religions
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constant
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A variable which does not vary
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continuous
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Can assume any value within defined measurement boundaries
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dichotomous
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Can only assume two mutually exclusive, but internally homogeneous qualitative categories
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discrete
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The result of a counting process
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distribution
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Refers to the display of the values a variable can assume, together with their respective absolute or relative frequency
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histogram
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Displays through rectangles the frequency with which the values of a continuous variable occur in specific ranges
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outlier
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Defined as a value larger than the third quartile plus 1.5 times the interquartile range, or the first quartile minus 1.5 times the interquartile range
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