ex3 - igno r i n g the in t e r ac t i o n 15:19 Wednesday...

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Unformatted text preview: igno r i n g the in t e r ac t i o n 15:19 Wednesday , May 7, 2008 33 The GLM Procedure Number of Observa t i o ns Read 12 Number of Observa t i o ns Used 12 igno r i n g the in t e r ac t i o n 15:19 Wednesday, May 7, 2008 34 The GLM Procedure Dependent Var iab l e : carbonat i o n Sum of Source DF Squares Mean Square F Value Pr > F Model 2 334.0657479 167.0328739 185.04 <.0001 Erro r 9 8.1241521 0.9026836 Correc t ed Tota l 11 342.1899000 R-Square Coef f Var Root MSE carbonat i o n Mean 0.976258 11.95842 0.950097 7.945000 Source DF Type I SS Mean Square F Value Pr > F tempera tu r e 1 109.9644500 109.9644500 121.82 <.0001 pressure 1 224.1012979 224.1012979 248.26 <.0001 Source DF Type I I I SS Mean Square F Value Pr > F tempera tu r e 1 4.5815880 4.5815880 5.08 0.0508 pressure 1 224.1012979 224.1012979 248.26 <.0001 Standard Parameter Est imate Erro r t Value Pr > | t | In t e r cep t - 147.4891892 21.35719240 - 6.91 <.0001 tempera tu r e 1.7187645 0.76291494 2.25 0.0508 pressure 4.5569884 0.28921679 15.76 <.0001 Questions: a) What are the null and alternative hypotheses for the t test having value 2.25 for temperature? What is the conclusion of this test? b) Can we conclude pressure has a significant linear effect on carbonation at the 0.05 level? The 0.01 level? c) What proportion of the variation in carbonation is explained by the variation in...
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ex3 - igno r i n g the in t e r ac t i o n 15:19 Wednesday...

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