Normal probability plot of the residuals

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Reference no: EM131015235

The percentage of "white area" in a sample of a dark product is used to evalu ate how well a white raw material has been mixed into the product. Using the data from whitearea .txt, which contains samples from two different mixing processes, do the following.

(a) Make a normal probability plot of the residuals and comment on it.

(b) Test to see if white area percentages differ for the two groups using a = 0.10. Explain what your results mean.

Reference no: EM131015235

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