Mean is the one of the most commonly used measures of central tendency. It’s a powerful tool for understanding…

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

To better illustrate the concepts of mean, median and mode, let’s dive into an example survey about what makes…

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

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

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