STATISTICS
Homeworks chapter 6 _1

# Homeworks chapter 6 _1 - Homeworks chapter 6 6.5 a...

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Homeworks chapter 6 6.5 a) According to the above results, the p value of the interaction effect is zero. So the interaction effect is significant at 0.05 level. Therefore there is sufficient evidence to claim that the vibration rate is affected by the interaction of both bit size and cutting speed. b)

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5.0 2.5 0.0 -2.5 -5.0 99 90 50 10 1 Residual Percent 40 30 20 4 2 0 -2 -4 Fitted Value Residual 4 2 0 -2 -4 4 3 2 1 0 Residual Frequency 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 4 2 0 -2 -4 Observation Order Residual Normal Probability Plot Versus Fits Histogram Versus Order Residual Plots for response According to the normal probability plot, there is no serious violations in the normality. Also in the residuals Vs. fitted plot there is no any pattern observed. So there is no serious violations in the constant variance assumption too. So the model assumptions are satisfied. c) 2 1 40 30 20 2 1 40 30 20 A B 1 2 A 1 2 B Interaction Plot for response Data Means According to the above interaction plot, the vibration level is low when the bit size is at lower level.
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