When a Common Regression Line for Two Groups Is Used

question 27

Multiple Choice

When a common regression line for two groups is used to predict performance, but the individual regressions lines for the groups differ where they cross the Y axis, which one of the following problems may occur?

• A) The performance of the group whose regression line crosses the y-axis at a higher point will be overpredicted.
• B) The performance of the group whose regression line crosses the y-axis at a lower point will be overpredicted.
• C) The performance of both groups will be overpredicted.
• D) The performance of neither group will be overpredicted.

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