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 study note on analysis of variance. The classical technique for comparing the two sample means is based on student's 't' test, but a different statistical technique, analysis of variance, is required when analysis of data of three or more experimental or field samples are involved. For example, a plant physiologist investigating the effect of [...]
The following points highlight the top three kinds of mathematical average. The kinds are: 1. Mean 2. Mode 3. Median. Kind # 1. Mean: (A) Arithmetic Mean: It is most commonly used of all the averages. It is the value which we get by dividing the aggregate of various items of the same series by the total number of observations. [...]