STAB22H3 Lecture 4: stab22_Lecture4.pdf
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STAB22H3 Full Course Notes
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In this lecture: we shall look at two quantitative variables. Two variables measured on the same cases are associated if knowing the value of one of the variables tells you something about the values of the other variable that you would not know without this information. Example: you visit a local starbucks to buy a mocha frappuccino. The barista explains that this blended coffee beverage comes in three sizes and asks if you want a small, a. The prices are . 15, . 65, and . 15, respectively. There is a clear association between the size and the price. When you examine the relationship, ask yourself the following questions: Definition: a response variable measures an outcome of a study. An explanatory variable explains or causes changes in the response variable. The legal limit for driving in most states is 0. 08%. University drank different numbers of cans of beer. Thirty minutes later, a police officer measured their blood alcohol content.
