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

In a box plot, the “box” represents the interquartile range (IQR) of the data. Inside the box, you find…

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

Introduction Let’s take a hypothetical example and consider a company as property. The value of a property can be…

There is an important distinction between a sample of data and population of data. So, let’s take a research…

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