There are two main kinds of studies, observational studies and, experimental studies. The statistical process can be viewed in…

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

Imagine you’re a teacher assessing student performance in a math exam where scores range from 0 to 100. You’ve…

1. “Fallen angels will all go back up, eventually.” A “fallen angel” is a stock that once performed well…

Data is set of observation. This observation can be collected in various ways such as field notes, survey or…

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