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…

In the world of statistics and data analysis, understanding the relationship between two variables is crucial. One of the…

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

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