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8 Cards in this Set

  • Front
  • Back
reliability
the extent to which a measurement procedure consistently measures whatever it measures
validity
the extent to which a measurement procedure measures what it is intended to measure
case (unit of analysis)
is the item (person, city, nation) for which we have data
levels of measurement
nominal, ordinal, interval, ratio
nominal
classification of observations into a set of categories that have no direction
ex: gender
ordinal
classification of observations into a set of categories that do have direction
ex: level of political participation
interval
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)
ratio
assigns real numbers to observations, has equal intervals of measurement, and has an absolute zero point
ex: income (0=0)