About NormalityAbout Normality

Previously, we conducted a successful A/A testing. To properly conduct A/B testing, we need to know how our data is distributed.

There are many types of distribution in statistics, but the most recognizable type is the Gaussian distribution (normal distribution). In nature, many things are normally distributed.

IQ distribution at Kyiv Polytechnic Institute according to test results in 2020:

Weight distribution among male in the Bruges in 2019:

But there are events to which the normal distribution is alien. The time between emails:

The average number of customers per hour:

Different types of tests are used for different distributions. In this section, we will focus on the normal distribution and how to test for normality.


Which of the following options do you think has a normal distribution?

Select the correct answer

Everything was clear?

Section 2. Chapter 1