Week 2 Study Notes

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13 Dec 2010
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GGR 270 Lecture 2 September 22, 2010
Variables and Data
Variable
oCharacteristic of the population that changes or varies over time
oExamples include temperature, income, education, etc...
oObserve and measure variables
oTwo key categories
Quantitative (numerical)
Discrete or continuous
Qualitative (non-numerical)
Male/female, species
Data
oResults from measuring variables set of measurements
oDifferent categories: Univariate, Bivariate, Multivariate
Variables Scales of Measurement I
Scale defines amount of information a variable contains and what statistical
techniques can be used
Four scales:
Nominal
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