Unit 4-3

Unit 4-3 - Chapter 5 Residuals, Residual Plots, &...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 5 Residuals, Residual Plots, & Influential points
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Residuals (error) - Residuals (error) - The vertical deviation between the the sum of the residuals is always always zero zero error = observed - expected y y ˆ residual - =
Background image of page 2
Residual plot Residual plot A scatterplot of the ( x , residual) pairs. Residuals can be graphed against other statistics besides x Purpose is to tell if a linear association linear association exist between the x & y variables If no pattern no pattern exists between the points in the residual plot, then the association is linear linear .
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Residuals x Residuals x Linear Linear Not linear Not linear
Background image of page 4
Age Range of Motion 35 154 24 142 40 137 31 133 28 122 25 126 26 135 16 135 14 108 20 120 21 127 30 122 One measure of the success of knee surgery is post-surgical range of motion for the knee joint following a knee dislocation. Is there a linear relationship between age & range of motion? Sketch a residual plot. Since there is no pattern in the residual plot, there is a linear relationship between age and range of motion x Residu als
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Range of Motion 35 154 24 142 40 137 31 133 28 122 25 126 26 135 16 135 14
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/09/2011 for the course STATS 221 taught by Professor Nielson during the Fall '10 term at BYU.

Page1 / 18

Unit 4-3 - Chapter 5 Residuals, Residual Plots, &...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online