The R^{2} statistic is the ratio of the variance of the fitted values to the variance of
the response variable.

Using the kidsfeet data:

- Find the variance of the response variable in the model
width ~ sex + length + sex:length .0.053 0.119 0.183 0.260 0.346
- Find the variance of the fitted values from the model0.053 0.119 0.183 0.260 0.346
- Compute the R
^{2}as the ratio of these two variances.0.20 0.29 0.46 0.53 0.75 - Is this the same as the “Multiple R
^{2}” given in the summary(mod) report?Yes No