# Question

You probably were startled to see the very neat relationships in Exercise 10.27. There was almost no variability about the regression line. I would, as a first approximation, guess that the relationship between television hours watched and standardized test performance would contain roughly as much scatter as the relationship between stress and symptoms, yet these data are far neater than the data in Figure 10.1. What might have caused this?

## Answer to relevant Questions

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