Linear Regression vs. Multiple Regression Example . Consider an analyst who wishes to establish a relationship between the daily change in a company's stock prices and daily changes in trading volume.

10.3.1 Scatterplot matrix. Recall that we use SAS’s scatterplot matrix feature to quickly scan for pairs of explanatory variables that might be colinear. To do this in R we must first make sure we ...

In the regression output above, we can see that for every one-point change in Visa, there is a corresponding 1.36-point change in the S&P 500.

Multiple regression models with survey data. Regression becomes a more useful tool when researchers want to look at multiple factors simultaneously. If we want to know whether the racial divide ...