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Chapter 11: Multifactor Analysis of Variance36.Source Df SS MS f F .01 *A (laundry treatment) 3 39.171 13.057 16.23 3.95B (pen type) 2 .665 .3325 .41 4.79C (Fabric type) 5 21.508 4.3016 5.35 3.17AB 6 1.432 .2387 .30 2.96AC 15 15.953 1.0635 1.32 2.19BC 10 1.382 .1382 .17 2.47ABC 30 9.016 .3005 .37 1.86Error 144 115.820 .8043Total 215 204.947*Because denominator degrees of freedom for 144 is not tabled, use 120.At the level .01, there are two statistically significant main effects (laundry treatment andfabric type). There are no statistically significant interactions.334

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