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

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

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

In the previous article we discussed how to visualize two categorical variables through dodged, staked bar graphs. Another way…

We have covered major measures of center and location—mean, median, and mode—we now turn to other important measures: percentiles…

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