Question

In: Statistics and Probability

A researcher would like to evaluate the effectiveness of a pain-relief patch designed for lower back...

A researcher would like to evaluate the effectiveness of a pain-relief patch designed for lower back pain. Prior to testing the patch, each of n = 4 patients rates the current level of back pain on a scale from 1 to 8. After wearing the patch for 90 minutes, a second pain rating is recorded. The data are as follows.

                                                Before        After

                                          __________________

                   G = 36                  6          2

                  G2 = 784                6          2

                ΣX2 = 192                4          4

                                                8          4

                                         ______________________

                                            T = 24   T = 12

                                          SS = 8    SS = 4

Perform a Repeated Measures ANOVA and then analyze the data with a repeated measures t-test. Use the .05 level of significance for both.

Solutions

Expert Solution

prior to testing the patch, each of n =4

The current level of back pain on a scale from 1 to 8

After wearing the patch for 90 minutes


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