MGMT 1050 Lecture Notes - Lecture 2: Level Of Measurement, Data Type, Bar Chart
14 Mar 2018
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Document Summary
Variable: some characteristic of a population or sample. Varies from person to person, thus the name. Values of the variable: possible observations of the variable. Data: observed values of a variable (plural form of datum) Three types: interval: real numbers, referred to as quantitative or numerical, nominal: categories, also called qualitative or categorical, ordinal: appear to be nominal, but order of their values has meaning, and thus must be maintained. Magnitude no important, as long as they are in order. Intervals or differences between values of interval are consistent and meaningful (can calculate or interpret), while the intervals or differences between ordinal values hold no meaning (cannot calculate or interpret) Calculations based on codes used to store this type of data are meaningless. Can only count or compute percentages of the occurrences of each category. Most important aspect = order of the values. Only permissible calculations are those involving a ranking process.
