Refer to Exercise 18.13. In spite of the results from period 2, we can still get a between patient comparison of the treatment groups if we use the period 1 results only. Suggest an appropriate test, run the test, and give the p-value for your test. Draw a conclusion.
In Exercise 18.13
An investigational drug product was studied under sleep laboratory conditions to determine its effect on duration of sleep. A group of 16 patients willing to participate in the study was randomly assigned to one of two drug sequences; 8 were to receive the investigational drug in period 1 and an identical-appearing placebo in period 2, and the remaining 8 patients were to ­receive the treatment in the reverse order.

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