## Regression

The resources below were chosen to align with the Clackamas Community College statistics curriculum.

 Topic Web page Video Other Scatterplots and Patterns Definition of scatterplot StatTrek Scatterplots and patterns StatTrek Explanatory and response variables R. Backman Scatterplots and patterns (video) StatTrek Cartoon: Relationship scatterplot xkcd.com Correlation Coefficient r and Coefficient of Determination r2 Correlation StatTrek Correlation coefficients and scatterplot examples onlinestatbook.com Correlation (video) StatTrek Correlation coefficients and scatterplot examples (video) onlinestatbook.com Excel: Correlation coefficient, coefficient of determination and interpetations brucesimmons.com Interactive web page: Matching r with scatterplots onlinestatbook.com Correlation Topics Correlation and causation Khan Academy Cartoon: Correlation xkcd.com Regression Line ŷ = b0 + b1x Calculating b0 and b1 and also r2 StatTrek Calculating b0 and b1 onlinestatbook.com Excel: Finding b0 and b1 brucesimmons.com Interactive web page: Guess the regression line onlinestatbook.com Residuals and Residual Plots Definition of residual StatTrek Residual plots StatTrek Influential points and outliers in regression StatTrek Computing residuals brucesimmons.com Residual plots (video) StatTrek Excel residual plots brucesimmons.com Influential points and outliers in regression (video) StatTrek Sums of Squares and Standard Error s Reading the output of a regression report Little Handbook of Statistical Practice Standard error s of the regression estimate onlinestatbook.com Calculating SSE and standard error s from a list of residuals brucesimmons.com Standard error s of the regression estimate (video) onlinestatbook.com Hypothesis Tests and Confidence Intervals Confidence interval for a population slope StatTrek Hypothesis test for a population slope StatTrek Finding the test statistic and p-value in a regression report brucesimmons.com Topic Web page Video Other