Question

Data summarized below describe product yield as a function of two variables describing the concentrations (%) of two reagents in the process. Use this information to address the questions belovw 1. Observation Yield 62. 9 76.2 87.5 102.3 76. 2 77.5 76.8 77.4 78.7 XI X2 15 4 13 15 12 12 9 12 I) Show a plot of standardized residuals as a function of leverage. Briefly describe what you conclud from this figure m) Examine any points identified as potential outliers, and briefly describe any characteristics of thos points that might help to explain why they appear to be outliers

Answer 1

I)

RESIDUAL OUTPUT PROBABILITY OUTPUT Observation Predicted Yield Residuals Standard Residuals Percentle Yield 3.1 2.35 2.35 3.1 -3.3 59.8 73.85 85.15 99.2 79.5 79.5 79.5 79.5 79.5 1.15635624 0.876592633 0.876592633 1.15635624 1.230959868 0.746036284 1.007148983 0.783338098 0.298414513 5.555556 16.66667 27.77778 38.88889 50 62.9 76.2 76.2 76.8 77.4 77.5 78.7 87.5 102.3 2 4 -2.7 2.1 0.8 72.22222 83.33333 94.44444 9

Normal Probability Plot 120 100 2 80 H60 40 20 0 Sample Percentile

-> This shows that residuals are normally distributed.

X1 Residual Plot 10.5 -1 11.5 12.5 13 13.5 -2 -3 -4 X1

-> Sum of residuals is 1.

2) There is no outlier exist in the data.