STAT 110 Lecture Notes - Lecture 1: Observational Study, Categorical Variable
8 Sep 2016
Department
Course
Professor
Document Summary
Statistics- is the science of data; how to interpret data, analyze data, and design studies to collect data. Individuals are often people, but they don"t have to be. Variables- is a characteristic that we measure on each individual. A categorical variable- places individuals into one of several groups or categories. A variable will usually take on different values for different individuals, this is called variation. Graphs can be used to display the variation observed in ne or more variables. Population- the entire group of individuals about which we want information. A sample- is the part of the population we actually observe. In most situations, the population is too large to observe. Survey- studies used to provoke (a response, answer, or fact), information about population of interest. Census- a special type of survey where the goal is to observe every individual in the population. Observational study- observes individuals and measures variables of interest.
