The following points highlight the four main measures of dispersion. They are: 1. Range2. Quartile Deviation3. Average Deviation or AD 4. Standard Deviation or SD. 1. Range: Range is the difference between the highest and the lowest scores in a series. In the words of R. W. Marks, the range is “a set of all […]
4 Main Measures of Dispersion and How It Helps in Educational Psychology
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