Concept explainers
The following data are from a study on Botox injections. Patients received a high-dose injection in one eye (experimental treatment = treatment E) and a low-dose injection in the other eye (control treatment = treatment C). Patients were asked to rate the level of pain in each eye on a 1–10 scale, with higher scores indicating more pain. The assignment of treatments to eyes was randomized. The subjects came back over several visits. Data from the last visit are given in Table 8.39.
Suppose we wish to compare the pain score in the E eye vs. the pain score in the C eye.
Table 8.39 Effect of Botox injection on eye pain
Perform this test, and report a p-value (two-tailed).
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Chapter 8 Solutions
WebAssign for Rosner's Fundamentals of Biostatistics, 8th Edition [Instant Access], Single-Term
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