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

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

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

A straightforward solution to deal with unit of variance which is in squared units is to simply calculate the…

In the previous article we discussed how to visualize two categorical variables through dodged, staked bar graphs. Another way…

In a dataset, an alternative plot apart from the histogram is a density plot. Similar to a histogram, a…