Lecture 1 Scales of Measurement
Scales of Measurement • Variables in a dataset contains information • Scales of measurement determines: – How much information is contained in a variable – What type of statistical tests are appropriate
Scales of Measurement • Nominal Variables: Data are names or labels used for identification purposes. Has only identity property. • Examples: name, gender, place of birth • Can be numeric or nonnumeric
Scales of Measurement • Ordinal Variables: Have the properties of the nominal data (i.e. identity). Also have meaningful order/rank information. • Examples: Class standing in a university, results of a 100m race (1 st , 2 nd , 3 rd ) • Can be numeric or nonnumeric
Scales of Measurement • Interval Variables: Have the properties of the ordinal scale (i.e. identity, magnitude). Also have equal intervals property (difference
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- Fall '17
- AMHET KOKSUEL