A Brief Introduction to Statistics - Part 1
What is Statistics? Collected observations are called data. Statistics is the study of how best to collect, analyze, and draw conclusions from data. Each observation in data is called a case. Characteristics of the case are called variables. With a matrix/table analogy, a case is a row while a variable is a column. Statistics - Correlation (Courtesy: xkcd.com) Types of variables: Numerical - Can be discrete or continuous, and can take a wide range of numerical values.