Bar Graph-two categorical variable In the previous article, we have discussed tabulating and graphing one categorical variable through table…

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

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

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

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

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