Four different though supposedly equivalent methods of apply

Four different, though supposedly equivalent, methods of applying torque to a bolt on to the chassis of a machine were performed on each of 5 bolts (in a random order), and the following are the measured torque applied in ft Ibf Bolt Method A Method B Method C Method D Perform an ANOVA [you may use R] to test whether it is reasonable to treat the 4 methods as equivalent at a significance level of a = 0.05.

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