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8 Cards in this Set
- Front
- Back
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reliability
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the extent to which a measurement procedure consistently measures whatever it measures
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validity
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the extent to which a measurement procedure measures what it is intended to measure
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case (unit of analysis)
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is the item (person, city, nation) for which we have data
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levels of measurement
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nominal, ordinal, interval, ratio
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nominal
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classification of observations into a set of categories that have no direction
ex: gender |
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ordinal
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classification of observations into a set of categories that do have direction
ex: level of political participation |
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interval
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assigns real numbers to observations and has equal intervals of measurement but has no absolute zero point
ex: THERMOMETER (0 does not = absence of what we're measuring) |
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ratio
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assigns real numbers to observations, has equal intervals of measurement, and has an absolute zero point
ex: income (0=0) |
