BIOL308 Lecture Notes - Lecture 5: Blood Alcohol Content, Dependent And Independent Variables, Univariate
6 Nov 2017
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Univariate data: data on just one single variable, height of a group, weight of a group, does not deal with causes or relationships, main purpose is to describe mean and median. Involving two or more variables: going to the doctors where multiple variables are collected, blood type, blood preassure, weight, height. Bivariate data: only two variables, examine whether there is a relationship between these two variables, do changes in one variable link with the changes the other. Response variable (dependent variable: outcome of the study (y) Explanatory variable (factor/independent variable: used to explain for the variation in the values of the response variable (x) More common type of factor is some kind of treatment: a specific experimental condition is defined at multiple levels. How does drinking beer affect the level of alcohol in our blood. Students volunteered to drank different numbers of cans of beer, police officers measured their blood alcohol content 30 mins later.
