SOC202H1 Lecture 2: Lecture 2 Jan 17th 2012 SOC202H1 Shirin Montazer
Document Summary
If n is equal than you do not have to standardize frequency, if they are unequal you must use proportion or percentage. Formula for proportion p = f / n. Nominal distributions can be listed in any order, however with ordinal and interval level must be ordered because there is an inherent order. Guidelines for constructing class intervals -> follow these for tests for full marks. Categories must be mutually exclusive (1-5, 6-10, 11-15) not (1-5, 5-10, 10-15) Possible to have too few or too many groups blurs the data. Example: suppose the ages of a smaple of 10 students are: 20, 18, 18, 21, 19, 25, 22, 23, 23, and. We selected k = 4 and w = (25 18) / 4 = 1. 75 which is rounded up to 2. True classes are those classes such that the upper true (or real) limit of a class is the same as the lower true limit of the next class.
