Statistical Sciences 1024A/B Chapter Notes - Chapter Chapter 1: Exploratory Data Analysis, Pie Chart, Bar Chart

• School: Western University
• Department: Statistical Sciences
• Course: Statistical Sciences 1024A/B

Document Summary

Categorical variables: pie charts and bar graphs. An exploratory data analysis is the process of using statistical tools and ideas to examine data in order to describe their main features. Individuals are the objects described by a set of data (1) e. g. students. A variable is any characteristic of an individual. A variable can take different values for different individuals. (1) e. g. students" age, height, grades. Can be further divided into: (1) discrete: finite, can list the value, e. g. how many cookies there are in the jar (2) continuous. Infinite: overall an interval of real numbers, e. g. weight (2) categorical (qualitative) Something that falls into one of several categories. E. g. your blood type (a, b, ab, o) Can be further divided into: (1) nominal: categories cannot be ordered, e. g. gender (2) ordinal, categories can be ordered, e. g. level of education. The distribution of a variable tells us what values it takes and how often it takes these values.