STAB22H3 Lecture Notes - Lecture 1: Social Class, Level Of Measurement
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STAB22H3 Full Course Notes
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Data: data is a set of values of qualitative or quantitative variables; restated, pieces of data are individual pieces of info, data is measured, collected and reported, and analyzed, whereupon it can be visualized using graphs or images. Individual cases (individuals) are the objects described by a set of data. A variable is any characteristic of an individual case. A variable can take different values on different individual cases: ex. In what units of measure is each variable recorded: ex. Variables: categorial (qualitative) variable: variable that places an individual into one of several groups or categories. These categories are sometimes called the levels: the set of categories for a categorical variable is called a nominal scale, ex. Annual income of canadians: ordinal scale: scale that falls between nominal and interval scales. Ordinal scales have a natural ordering of values but undefined interval distances between the values: ex.
