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# HW1 - HW 1 DUE Friday May 23 Text Questions 11.2 11.3 11.4...

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HW 1: DUE: Friday, May 23 Text Questions: 11.2 11.3 11.4 11.8 11.10  1. The following is SAS output analyzing the length of time a saw stayed useable.  There  were two manufacturers tested, and the saws were run at different speeds (RPM).  The  response variable was measured in hours. tool data 19:05 Tuesday, May 13, 2008 10 The GLM Procedure Class Level Informat ion Class Levels Values type 2 A B Number of Observat ions Read 20 Number of Observat ions Used 20 tool data 19:05 Tuesday, May 13, 2008 11 The GLM Procedure Dependent Variab le : hours Sum of Source DF Squares Mean Square F Value Pr > F Model 3 1411.195142 470.398381 45.92 <.0001 Error 16 163.893038 10.243315 Corrected Total 19 1575.088180 R-Square Coeff Var Root MSE hours Mean 0.895947 13.05322 3.200518 24.51900

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Source DF Type I SS Mean Square F Value Pr > F rpm 1 227.032596 227.032596 22.16 0.0002 type 1 1157.075800 1157.075800 112.96 <.0001 rpm*type 1 27.086747 27.086747 2.64 0.1235 Source DF Type II I SS Mean Square F Value Pr > F rpm 1 301.2516372 301.2516372 29.41 <.0001 type 1 142.8134363 142.8134363 13.94 0.0018 rpm*type 1 27.0867468 27.0867468 2.64 0.1235 Standard Parameter Estimate Error t Value Pr > |t | Intercept 56.74535326 B 5.32055366 10.67 <.0001 rpm - 0.03291426 B 0.00692759 - 4.75 0.0002 type A - 26.56934009 B 7.11568139 - 3.73 0.0018 type B 0.00000000 B . . .
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