POS 3703 Lecture Notes - Lecture 3: Descriptive Statistics, Likert Scale, Standard Deviation

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12 Sep 2016
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A variable in an empirical measurement of a characteristic (essentials, p. 28). At least two values: only one value would be a constant. Levels of measurement: nominal level variable records the differences that can"t be compared with math a, may have many possible values (categorical) or just yes/no (binary), ordinal level variable a. b. c. Records relative differences in value can be compared with inequalities > and < can"t be compared with arithmetic +/ : interval level variable, most precise measurements, can be compared with math, many possible values. The level of measurement dictates how we analyze a variable. Important to keep levels of measurement in mind when we interpret statistical models. Sometimes we can treat ordinal variables like interval variables where there are 5+ categories with many observations to each. # gss records marital status of gss respondents. # nes records marital status of gss respondents. 100. 000: divorced, separated 67. 680, widowed 181. 307, never married, partnered, not married {vol}

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