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

In data analysis, identifying outliers with the box plot  rule helps pinpoint data points that significantly deviate from the…

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

There are two main kinds of studies, observational studies and, experimental studies. The statistical process can be viewed in…

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

Imagine you’re a teacher assessing student performance in a math exam where scores range from 0 to 100. You’ve…