Page 217 - Statistics II for Dummies

Chapter 11: Finding Your Way through Two-Way ANOVA 201

Two-way ANOVA: BP versus Dosage, Times
Source DF SS MS F P
Dosage 2 56.3333 28.1667 112.67 0.000
Times 1 4.1667 4.1667 16.67 0.001
Interaction 2 0.3333 0.1667 0.67 0.526
Error 18 4.5000 0.2500
Total 23 65.3333

S = 0.5 R-Sq = 93.11% R-Sq(adj) = 91.20%
a
Two-way ANOVA: BP versus Dosage, Times
Source DF SS MS F P
Dosage 2 0.0833 0.04167 0.16 0.855
Times 1 0.3750 0.37500 1.42 0.249
Interaction 2 16.7500 8.37500 31.74 0.000
Error 18 4.7500 0.26389
Total 23 21.9583
S = 0.5137 R-Sq = 78.37% R-Sq(adj) = 72.36%
b
Two-way ANOVA: BP versus Dosage, Times
Source DF SS MS F P
Dosage 2 0.0833 0.041667 0.08 0.926
Times 1 0.3750 0.375000 0.69 0.416
Interaction 2 0.7500 0.375000 0.69 0.513
Error 18 9.7500 0.541667
Total 23 10.9583
c S = 0.7360 R-Sq = 11.03% R-Sq(adj) = 0.00%

Two-way ANOVA: BP versus Dosage, Times
Source DF SS MS F P
Dosage 2 36.7500 18.3750 47.25 0.000
Times 1 0.6667 0.6667 1.71 0.207
Interaction 2 0.0833 0.0417 0.11 0.899
Error 18 7.0000 0.3889
Total 23 44.5000
S = 7.6236 R-Sq = 84.27% R-Sq(adj) = 79.90%
d

Figure 11-2: Two-way ANOVA: BP versus Dosage, Times
ANOVA Source DF SS MS F P
Dosage
0.0417
0.16
0.0833
tables Times 2 1 12.0417 12.0417 45.63 0.855
0.000
for the Interaction 2 0.0833 0.0417 0.16 0.855
interaction Error 18 4.7500 0.2639
plots from Total 23 16.9583
Figure 11-1. S = 0.5137 R-Sq = 71.99% R-Sq(adj) = 64.21%
e

17_466469-ch11.indd 201 7/24/09 9:44:18 AM