Explanation Given info: The data shows the reduction in pain level after the magnet treatment and after the sham treatment. The pain was measured using the visual analog scale. Also, the higher scores correspond to greater pain levels. For reduction in pain level after sham treatment, n = 20 , x ¯ = 0.44 , and s = 1.4 . For reduction in pain level after magnet treatment, n = 20 , x ¯ = 0.49 , and s = 0.96 . Calculation: State the test hypotheses. Let first population denote the sham treatment and second population denote the magnet treatment. Null hypothesis: H 0 : σ 1 = σ 2 Alternative hypothesis: H 1 : σ 1 > σ 2 Test statistic and P-value: Software procedure: Step-by-step procedure to obtain test statistic and P -value using the MINITAB software is as follows: Choose Stat > Basic Statistics > 2 Variance . Under Data , choose Sample standard deviation . In First, enter 20 under Sample size . In First, enter 1

13th Edition

ISBN: 9780134462455

Author: Mario F. Triola

Publisher: PEARSON

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Chapter 9.4, Problem 11BSC

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To test: The claim that those given sham treatment have pain reductions that vary more than the pain reductions for those treated with magnets.

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Chapter 9.4, Problem 10BSC

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Chapter 9 Solutions

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To test: The claim that those given sham treatment have pain reductions that vary more than the pain reductions for those treated with magnets.

Solution Summary: The author concludes that there is enough evidence to reject the claim that those given sham treatment have more pain reductions than those treated with magnets

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To test: The claim that those given sham treatment have pain reductions that vary more than the pain reductions for those treated with magnets.

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Chapter 9 Solutions