1. Many people believe that magnets relieve back pain. In order to test that belief, an experiment was conducted. Pain was measured using the visual analog scale before and after the treatments. Subjects with back pain were randomly assigned to either the treatment group or placebo group. This was a double blind experiment. Assume that the distribution of each group is approximately normal. Reduction in pain level after magnet treatment: n = 20 x=0.49 s = 0.96 Reduction in pain level after placebo treatment: n=20 x = 0.44 s = 1.4

1. Many people believe that magnets relieve back pain. In order to test that belief, an experiment was conducted. Pain was measured using the visual analog scale before and after the treatments. Subjects with back pain were randomly assigned to either the treatment group or placebo group. This was a double blind experiment. Assume that the distribution of each group is approximately normal. Reduction in pain level after magnet treatment: n = 20 x=0.49 s = 0.96 Reduction in pain level after placebo treatment: n=20 x = 0.44 s = 1.4

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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