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6 Cards in this Set
- Front
- Back
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variables |
the characteristics of the individuals about which we collect info |
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data |
the set of variables we obtain |
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census data versus sample data |
census- a study of every unit (everyone/thing) sample- a study of a random sample (a few) |
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qualitative variables versus quantitative variables |
qualitative: puts into categories (counted) quantitative: tell how much/how many (measured) |
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nominal, ordinal, interval and ratio-level data |
nominal: no natural ordering-gender(qualitative) ordinal: natural ordering-A,B,C,D(qualitative) interval: degree of difference between items ratio-level: |
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discrete versus continuous data |
discrete: countable, no decimals (counted, eggs) continuous: infinitely many possible (measured, milk & time) |
