# STAT 246 Lecture Notes - Lecture 1: Vertica, Random Variable, Observational Error

## Document Summary

Stat 246. 3 introduction to biostatistics. Glossary for chapters 1, 2, 3, 4, 7, 9. Graph that shows the distribution of a categorical variable by representing each category as a bar. The bar heights show the category counts or percents. A variable that places an individual into one of several groups or categories. A quantitative variable that can take any real numerical value over an interval. Tells us what values a variable takes and how often it takes these values. The examination of data with statistical tools and ideas in order to describe their main features. The most common graph of the distribution of one quantitative variable. Chosen classes should always be of equal width. Object described by a set of data. They may be people, but they may also be animals, plants or things. A categorical variable that is purely qualitative and unordered, like flower colour. An individual value that falls outside the overall pattern of distribution.