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

To understand how spread out a set of data points can be, we need to measure the variation. The…

Imagine you’re a teacher assessing student performance in a math exam where scores range from 0 to 100. You’ve…

In data analysis, identifying outliers with the box plot  rule helps pinpoint data points that significantly deviate from the…

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

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