From Lab 3, Problem 2
2. The data set magnet is from an experiment to see the effect of voltage and number of turns on the magnetic force of an electromagnet. The experimenters expected to see a limit to which the number of turns could increase the force. (This is actually a randomized complete block experiment where the three electromagnets are the blocks. The experimenters measured the magnetic force 6 times at each combination of volt and turns. Such repetitions are not true replications but rather repeated measurements to reduce measurement error. Therefore we have taken the mean of the 6 measurements as our response variable force.) Make an mplot, means, and an mfit. Describe the results. What do you conclude about the effect of voltage and number of turns on magnetic force?
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