In this article we will discuss about the calculation of Mean Deviation (MD). (MD or AD) The average value of the different deviations from the mean is a more accurate measure of variability. It is designated as Mean Deviation (MD) or Average Deviation (AD) or Mean Variation (MV). According to Garett, “The average deviation or […]
Calculation of Mean Deviation (MD) | Statistics
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4 Main Measures of Dispersion and How It Helps in Educational Psychology
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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 […]
Correlation: Definitions, Types and Importance | Statistics
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In this article we will discuss about:- 1. Definitions of Correlation 2. Types of Correlation 3. Importance 4. Methods 5. Uses of the Co-Efficient. Definitions of Correlation: According to English & English: “Correlation is a relationship or dependence. It is the fact that two things or variables are so related that change in one is […]