4.13 Example #2: Estimate the Baseline Slope

Here’s another example. In this graph, we want to decrease the number of times a student rips up his work during your class.

A graph displaying the Estimate of the Baseline Slope for treatment.

Are the actual treatment data DIFFERENT than what you would have predicted, given the baseline data?

Estimate the baseline slope

Extend that line into the treatment phase

Evaluate whether the slope or level of the actual treatment data are different from what you predicted

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