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

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 r^{2}

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 = b_{0} + b_{1}x

Calculating b_{0} and b_{1} and also r^{2} StatTrek

Calculating b_{0} and b_{1} onlinestatbook.com

Excel: Finding b_{0} and b_{1} 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