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 test of significance. Test of Significance: In biological research when we compare any character of two samples, we calculate the significance of difference in the mean and variance to draw a meaningful conclusion. For example, if we are interested to compare the protein content of two seed varieties of maize or [...]
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 [...]