PEDS109 Lecture Notes - Level Of Measurement, Mnemonic, Mathematical Notation
28 Apr 2013
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Nominal scale: nominal scales have a set of categories with different names. So many people walked, so many people drove etc. : we can assign values but the magnitude of the differences are meaningless, no no numeric; minal 0 minimal use. Ordinal scale: as increase in numeric value, the order of the number is important, ex. John finished a race n 1st, dave finishes in 2nd, and mike finished in 3rd. The numbers imply a rank order of performance. 1st and 2nd is meaningless in terms of magnitude. John could finish in 20:10 and dave could finish in 20:11 and mitke could finish in 27:45. Interval scale: most common interval scale is temperature interval scales contain a set of ordered categories and the interval (difference) between each successive category is the same. , ex. 0-1 degrees difference of 1 degree is the same difference of 1 degree in.
