DISCUSS    Regression and Correlation
Home & Home page for this unit
Introduction & Scatterplots and Lines
Excel.gif (944 bytes) Tell me about y=mx+c
Excel.gif (944 bytes) Test me about y=mx+c
& Examples
Lines & Residuals and Least Squares
Excel.gif (944 bytes) What is least squares?
& Scaling and transformations
Excel.gif (944 bytes) Investigate transformations
& Other Criteria for Best Fit
Excel.gif (944 bytes) Experiment with other criteria
Goodness-of-fit & How good is the best?
Excel.gif (944 bytes) Standard Error
& R-squared
Excel.gif (944 bytes) How is r-squared calculated?
& Correlation
Excel.gif (944 bytes) Guessing correlations
More Correlation & Interpreting correlations
Excel.gif (944 bytes) Investigating correlation
& Causality
& Linearity
& Significance
Excel.gif (944 bytes) Bivariate Normal Distributions
Excel.gif (944 bytes) Bivariate Normal samples
Excel.gif (944 bytes) Sampling distribution of r (when  r=0)
Excel.gif (944 bytes) Sampling distribution of r (when  r<>0)
Assumptions & Assumptions of regression analysis
& Linearity
& Independence
& Constant variance
& Normality
& Checking assumptions
Excel.gif (944 bytes) Residual plots
Excel.gif (944 bytes) Normal probability plots
Prediction & Interpolation and extrapolation
& Variation in predictions
Excel.gif (944 bytes) Exploring variations in predictions
& Margins of error for predictions
Excel.gif (944 bytes) Investigating margins of error
Non-linear models & Non-linear trendlines
Excel.gif (944 bytes) Trendlines in Excel
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