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Question 7 of 10 > > Question 7 10 points Save Answer The engineer is interested in determining if the RF power setting affects the etch rate, and she has run a completely randomized experiment with four levels of RF power and n=20 observations. Calculate F Source of Variation OF 55 MS Treatments Error 5339.2 Total 72209.75 O 18.04 O 27.9 O 3.24 66.8