Previous article discussed the basic contingency table of proportions and percentages. People often want to ask more about relationships…

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…

Stock Traders look for various signal like GDP, inflation rate, interest rate to predict the future economic condition. One…

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

In a dataset, an alternative plot apart from the histogram is a density plot. Similar to a histogram, a…