Choosing which statistical test to use, given the variables is often confusing for researchers and analyst. One of the…

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

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

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

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

Unlike the mean and median, which represent average and middle values respectively, the mode identifies the most frequently occurring…