# hw3 - Problem 5-4 Glass Type Phosphor Type 1 2 3 1 280 300...

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Unformatted text preview: Problem 5-4. Glass Type Phosphor Type 1 2 3 1 280 300 290 290 310 285 285 295 290 2 230 260 220 235 240 225 240 235 230 a) Is there any indication that either factor influences brightness? Use 0,05 α = . Create DOE: Stat->DOE->Create Factorial Design->General Full Factorial Design. Analyze: Stat->DOE->Analyze Factorial Design Factorial Design General Factorial Design Factors: 2 Factor Levels: 2; 3 Runs: 18 Replicates: 3 * ERROR * Constant expected. General Linear Model Factor Type Levels Values glass fixed 2 1 2 phosphor fixed 3 1 2 3 Analysis of Variance for response, using Adjusted SS for Tests Source DF Seq SS Adj SS Adj MS F P glass 1 14450,0 14450,0 14450,0 273,79 0,000 phosphor 2 933,3 933,3 466,7 8,84 0,004 glass*phosphor 2 133,3 133,3 66,7 1,26 0,318 Error 12 633,3 633,3 52,8 Total 17 16150,0 Term Coef StDev T P Constant 263,333 1,712 153,79 0,000 glass 1 28,333 1,712 16,55 0,000 phosphor 1 -3,333 2,422 -1,38 0,194 2 10,000 2,422 4,13 0,001 glass*phosphor 1 1 -3,333 2,422 -1,38 0,194 1 2 -0,000 2,422 -0,00 1,000 Analysis for the type of glass factor: Since 0.05,1,12 273,79 4,75 F F = = (rejection region is 0.05,1,12 F F ), we conclude that the type of glass significantly affects the brightness of a television tube. Analysis for the type of phosphor factor: Since 0.05,2,12 8,84 3,89 F F = = (rejection region is 0.05,2,12 F F ), we conclude that the type of glass significantly affects the brightness of a television tube....
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## This note was uploaded on 08/27/2011 for the course EIN 4905 taught by Professor Staff during the Spring '08 term at University of Florida.

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hw3 - Problem 5-4 Glass Type Phosphor Type 1 2 3 1 280 300...

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