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mont4e_sm_ch14_sec03 - CHAPTER 14 Section 14-3 14-1 a 1 H 0...

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14-1 CHAPTER 14 Section 14-3 14-1 a) 1. 0 : 2 1 0 = = τ τ H 0 one least at : 1 i H τ 2. 0 : 3 2 1 0 = = = β β β H 0 one least at : 1 j H β b) Analysis of Variance for current Source DF SS MS F P glasstyp 1 14450.0 14450.0 273.79 0.000 phostype 2 933.3 466.7 8.84 0.004 glasstyp*phostype 2 133.3 66.7 1.26 0.318 Error 12 633.3 52.8 Total 17 16150.0 Main effects are significant, the interaction is not significant. Glass type 1 and phosphor type 2 lead to the highest mean current (brightness). c) There appears to be more slightly variability at phosphor type 2 and glass type 2. The normal plot of the residuals shows that the assumption of normality is reasonable. 3 2 1 15 10 5 0 -5 -10 phostype Residual Residuals Versus phostype (response is current) 2.0 1.5 1.0 15 10 5 0 -5 -10 glasstyp Residual Residuals Versus glasstyp (response is current) 15 10 5 0 -5 -10 2 1 0 -1 -2 Normal Score Residual Normal Probability Plot of the Residuals (response is current)
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