11.74 Smart Phones, continued Refer to Exercise 11.73. The diagnostic plots for this experiment are shown below. Does it appear that any of the analysis of variance assumptions have been violated? Explain.

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Percent 99 Normal Probability Plot of the Residuals (Response is Ratings) 95 90 80 70 60 50 40 828 30 20 10 5 1 -5.0 -25 00 Residual 25 25 5.0