STAB22H3 Lecture Notes - Lecture 2: Categorical Variable

• School: UTSC
• Department: Statistics
• Course: STAB22H3
• Professor: Srishta Chopra

Document Summary

Pages 7-16: let us revisit data , pl. Participants- we understand their role in a experiment. Cases- when objects we want study are not people. Population- a set of indiduals that we are interested in studying. Sample- a subset of the indidiuals of a population. Individual objects upon which we collect data: what: Variables: the characteristics measured or recorded about each case. Categorical variable: placing an individual or case into group, answers questions about how it falls into categories (ex. Quantitative variable: numerical values, can be measured with units (ex. Identifier variable: a variable holding a unique name. useful in matching data from dif. databases. What: wealth + life expectancy of the countries (both are quantitative variables: why: main aim of study, get it from the what in the study by using variables. Based on the video: relationship w/ income for 200 countries and life expectancy. Based on the video: it was done by a survey.