In this article we will discuss about the presentation methods of statistical data. 1. Tabulation: Tables are devices for presenting data simply from masses of statistical data. Tabulation is the first step before data is used for analysis. Tabulation can be in form of Simple Tables or Frequency distribution table (i.e., data is split into convenient groups). 2. Charts and [...]
The following points highlight the three types of measures of central tendency. The types are: 1. Mean 2. Median 3. Mode Type # 1. Mean: It is also known as arithmetic mean. It is the ordinary average in Arithmetic. According to Garrett, "The arithmetic mean, or more simply the mean, is the sum of the separate scores or measures divided [...]
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 AD (also written mean deviation [...]