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Question 4 For the following data set Type 1 Type 2 Type 3 Type 4 42 28 24 20 30 36 36 32 39 31

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Question 4 For the following data set Type 1 Type 2 Type 3 Type 4 42 28 24 20 30 36 36 32 39 31 28 38 28 32 28 28 29 27 33 25 Perform ANOVA at 1% significance level and conclude whether there exists any difference in effectiveness across four types of machines. (15 marks)

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