One of the way to measure the variability is to calculate the difference of each observation from the mean.…

The basic principle of how stock prices move is based on market demand and supply. When there are more…

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

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…

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