In the worked example we already considered above, if we run the multiple linear regression, we would generate a 95% confidence interval (CI) around the regression coefficient for age, which is a ...

We can chart a regression in Excel by highlighting the data and charting it as a scatter plot. To add a regression line, choose "Add Chart Element" from the "Chart Design" menu.

Residual plots can be used to validate assumptions about the regression model. Figure 1: Residual plots are helpful in assessments of nonlinear trends and heteroscedasticity. A formal test of lack ...