The following points highlight the top three ways to measure dispersion. The ways are: 1. Variance 2. Standard Deviation 3. Coefficient of Variation. Way # 1. Variance: Variance depends on the deviations where the squared deviations are summed up and then divided by the number of observations to get the sample variance. It has a distinct advantage over mean deviation [...]
The below mentioned article provides a note on frequency distribution. For any statistical analysis, the handling with raw data requires some treatment, i.e., the classification of data to organise the available values in a more compact way. The frequency distribution presents the data very concisely indicating how frequently a variable occurs in a group of study. Construction of Frequency Distribution [...]
The below mentioned article provides a note on distribution pattern. The frequency distribution and their graphical representation like frequency polygon, histogram, bar diagram. But sometimes the knowledge of distribution pattern is required to comment on the population on the basis of observation of sample. Normal Distribution: If we observe in any population any attribute is distributed mostly near the mean [...]