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 = 9 patients rates the current level of back
pain on a scale from 1 to 10. After wearing the patch for 90
minutes, a second pain rating is recorded. The data are as
follows:
A Researcher Would Like To Evaluate The Effectiveness Of A Pain Relief Patch Designed For Lower Back Pain Prior To Test 1 (47.26 KiB) Viewed 14 times
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 = 9 patients rates the current level of back pain on a scale from 1 to 10. After wearing the patch for 90 minutes, a second pain rating is recorded. The data are as follows: Before After 6 2 8 3 9 4 8 1 10 2 5 3 9 8 7 7 6 2 Do the results indicate a significant difference? Use a two-tailed test with a = .05 The mean for the sample of difference score is and the variance is . The standard error is the df is . Our calculated t-value is . For this reason we the null hypothesis.
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