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8 Cards in this Set
- Front
- Back
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Scales of Measurement
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Nominal scale (lowest)
Ordinal scale Interval scale Ratio scale (highest) |
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Nominal scale
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lowest level, has equivalence; categories
ex) brand of shoes |
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Ordinal scale
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rank orders, has equivalence and ordering
ex) people came in 1, 2, 3rd in race |
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Interval scale
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equal intervals, has equivalence, ordering, equal intervals; arbitrary 0
ex) temperature (even at 0, there's still some heat) |
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Ratio scale
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like what you do with a ruler; has equivalence, ordering, equal interval, true 0 point
ex) Calvin scale, length, time, weight, height, speed |
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Continuous variable
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can take on any value; infinite amount of values between units on the scale
ex) weight, time |
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Discrete variable
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no possible values between
take on values which are whole integers; things we can count ex) # of kids, # of suicide attempts |
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Real limits
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values that are above and below the recorded value by one-half of the smallest measuring unit of the scale
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