Variance represents the average of the squared deviations from the mean. Because we square the deviations, the variance is…

Bar Graph-two categorical variable In the previous article, we have discussed tabulating and graphing one categorical variable through table…

Previous article discussed the basic contingency table of proportions and percentages. People often want to ask more about relationships…

Creating good graphics is a very important part of data visualization. Data visualization is not a science this is…

To understand how spread out a set of data points can be, we need to measure the variation. The…

Introduction Let’s take a hypothetical example and consider a company as property. The value of a property can be…