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

One issue with range and the interquartile range (IQR) both is that they don’t include information from all the…

To understand how spread out a set of data points can be, we need to measure the variation. The…

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

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

We’ve discussed the mean previously about mean or average as a measure of central tendency, let’s explore two other…