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

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

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

The Challenger disaster occurred on January 28, 1986, during the launch of the Space Shuttle Challenger. The Space Shuttle…

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

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