2.17 Detecting Smaller Changes in Level

So far, the level changes you have seen have been pretty large and fairly obvious. But smaller changes are important, too. They can be harder to see, so let’s start practicing. 

A graph detecting smaller changes in the level of back pain relative to treatment.
This change is fairly large
A graph displaying the level of smaller changes between treatment and baseline.
This change is smaller, but you can still see that there is a difference
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