Normal Q-Q Plot Explained

Normal QQ is used to check whether a variable is normally distributed or not. Have you ever wondered how does it work? What is theoretical quantile? This article will answer all these questions.

Before going further, let’s understand few terms.

What is Z-score?
“Z-score is defined as number of standard deviation away from the mean of a dataset”.

Standardisation / Standard Normal Distribution
Calculation of z-score of each data point is called “Standardisation” and its distribution plot is known as “Standard…