Q 68. Beer and blood alcohol The examp... [FREE SOLUTION]

91影视

The Practice of Statistics for AP

David Moore,Daren Starnes,Dan Yates

$Math Studyset 91影视 Explanations$ Math

4th Edition 路 809 pages

ISBN: 9781319113339

Chapter 3: Q 68. (page 196)

Beer and blood alcohol The example on page $182$ describes a study in which adults drank different amounts of beer. The response variable was their blood alcohol content (BAC). BAC for the same amount of beer might depend on other facts about the subjects. Name two other variables that could account for the fact that $r^{2} = 0.80 .$

Short Answer

Expert verified

There is no cause- and effect tie between the used number of cans of beer and the BAC level.

Step by step solution

Given information

Beer and alcohol in the blood On page $182$ , there is an example of a research in which participants consumed various amounts of beer. Their blood alcohol concentration was the response variable (BAC). BAC for the same amount of beer could be affected by their knowledge of the issue.

Concept

A regression line is a straight line that depicts the change in a response variable $y$ when an explanatory variable $x$ changes. By putting this $x$ into the equation of the line, you may use a regression line to predict the value of $y$ for any value of $x$

Explanation

Take, for example, the instance of Beer and Blood Alcohol. The concentration of alcohol in the blood is measured by the blood alcohol content (BAC). As a rapid indicator of BAC, the researchers employed a number of beer cans. The BAC for the same amount of beer could be affected by various factors such as the subjects' body type and weight. The quantity of beer cans consumed and the BAC level have no causal relationship.