# ch 6 - Chapter 6 Regression This chapter is about making...

This preview shows pages 1–2. Sign up to view the full content.

Chapter 6: Regression - This chapter is about making predictions. - The higher the correlation between the independent variable and the dependant variable, the more accurate the predication will be. Regression analysis: - Applies to paired data (Xi,Yi) where X is the independent variable w/ values Xi that are selected in advance and y is the dependant variable with values Yi that are free to vary. - Regression procedures also are applicable when both x and y are free to vary as they are in correlation. Multiple Regression: - The simultaneous use of two or more predictors in predicting a dependent variable Objectives: - How to predict one variable from another - How to determine the line of best fit - The relationship between r and the slopes of the best-fitting regression lines - What the standard error of estimate is and how to interpret it - How to interpret multiple regressions and multiple correlations An Overview of the Prediction Process: - An example of George’s Statistics class, tracked his grades, made a scatter plot, - Predictions based on small samples tend to be unstable. They tend to vary markedly from sample to sample. Improvement can be made by utilizing all the data rather than a small subset of the data. - “I started smoking because I am socially inadequate” –Just thought that would make you smile, don’t be stressed out! 26 hours till your birthday! - Predictions based on the regression line take into account all the sample data and hence are more stable than those based on only the mean of the Y scores corresponding to a given X score. 6.2 Criterion for the line of best fit:

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 04/15/2008 for the course STATS 2402 taught by Professor Kirk during the Spring '08 term at Baylor.

### Page1 / 3

ch 6 - Chapter 6 Regression This chapter is about making...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online