To better illustrate the concepts of mean, median and mode, let’s dive into an example survey about what makes…

Describing Numerical Data In the previous articles we described two kinds of variable numerical and categorical, also known as…

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

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

Stem and leaf plot is used to plot for a numerical variable. It’s essentially a way to list our…

When analyzing distributions, we often discuss their modalities. The modalities is the number of peaks they exhibit. A distribution…