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

If you have a sample or population of data and you want to understand the different properties, the different…

There is an important distinction between a sample of data and population of data. So, let’s take a research…

In previous article we discussed about variance and standard deviation, assuming we had a population of data, even though…

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

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