This document describes the different types of variables one might encounter in different contexts. It is not meant to be a comprehensive reference; it only contains enough information to get by …

Identify variables as numerical and categorical. If variable is numerical, further classify as continuous or discrete based on whether or not the variable can take on an infinite number of …

Types of variables There are two ways to classify variables that will be important to us in this course. One is to decide whether a variable is continuous or discrete and the other is to decide …

Scientists use an experiment to search for cause and effect. There are many items that could be altered to test the reaction of another. These changing quantities are called variables. A …

There are different ways to mea-sure the spread. In this lesson, we’ll use the difference between the maximum and minimum value. Note that the interval is two numbers while the spread is a …

Types of Variables (con’ t) nInterval/Ratio Categories. nVariables are ordered and have equal space between them. nSalary measured in dollars. nAge of an individual. nNumber of children. …

Examples of continuous variables are body mass, height, blood pressure and cholesterol. A discrete quantitative variable is one that can only take specific numeric values (rather than any …