stat 3.3

# stat 3.3 - to a change of r standard deviations in y The...

This preview shows page 1. Sign up to view the full content.

AP Statistics Chapter 3 3.3 If a scatterplot shows a linear relationship, we would like to summarize this overall pattern by drawing a line through the scatterplot. The regression line describes how a response variable changes as the explanatory variable changes. Least-squares regression line is a method for finding a line that summarizes the relationship between two variables, but only in a specific setting. The slope of the least squares regression line is b= r This says that in the regression line the change of one standard deviation in x corresponds
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: to a change of r standard deviations in y. The coefficient of determination is r^2. A residual is the observed value – predicted y or y - You must become aware of any outliers or extreme observations in regression Correlation and regression are closely connected. You can examine the fit of a regression line by studying the residuals. You have to look for influential observations, they are often outliers in the x direction, but they need not have large residuals....
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern