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Surgery vs. placebo for the knee pain: Refer to Example 10. Is Arthroscopic Surgery Better than Placebo? Here we show MINITAB output comparing mean knee pain scores for the placebo (group 1) to debridement arthroscopic surgery (group 2).
a) State and interpret the result of the confidence interval.
b) State all steps and interpret the results of the significance test.
c) Based on the confidence interval and test m would you conclude that the arthroscopic surgery works better than the placebo? Explain.

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