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The Waiting Time (In Minutes) Was Measured for a Random

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The waiting time (in minutes) was measured for a random sample of patients with non-life threatening injuries in emergency rooms at four local hospitals who arrived between 2:00 and 3:00pm on a particular Saturday. Check the output to see whether the same-variance condition for ANOVA holds. Show your work. Is ANOVA appropriate? Source DF Adj SS Adj MS F-Value P-Value Factor 3 504.8 168.28 4.97 0.006 Error 31 1048.7 33.83 Total 34 1553.5 Analysis of Variance Means Factor N Mean StDev A 9 13.11 3.41 B 7 14.29 1.60 C 9 16.33 8.08 D 10 22.60 6.82

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