Introduction to sampling theory
Before diving into descriptive statistics in streaming data, it is important to understand the basics of descriptive statistics in regular data. The domain that deals with the estimation of descriptive statistics using samples of the data is called sampling theory.
Comparing population and sample
In regular statistics, the concept of population and sample is very important. Let's have a look at the definitions before diving into it further:
- Individual: Individuals are the individual objects or people that are included in a study. If your study looks at products on a production line and you measure the characteristics of a product, then the individual is the product. If you are doing a study on website sales and you track data on each website visitor, then your individual is the website visitor.
- Population: A statistical population is generally defined as the pool of individuals from which a sample is drawn. The population contains...
