Kuehl -- Example 8.1 -- Nitrate Nitrogen The GLM Procedure Class Level Information Class Levels Values trt 6 1 2 3 4 5 6 block 4 1 2 3 4 Number of Observations Read 24 Number of Observations Used 24 Kuehl -- Example 8.1 -- Nitrate Nitrogen The GLM Procedure Dependent Variable: nitrate Sum of Source DF Squares Mean Square F Value Pr > F Model 8 398.3203167 49.7900396 6.91 0.0007 Error 15 108.0084167 7.2005611 Corrected Total 23 506.3287333 R-Square Coeff Var Root MSE nitrate Mean 0.786683 6.378131 2.683386 42.07167 Source DF Type I SS Mean Square F Value Pr > F trt 5 201.3163833 40.2632767 5.59 0.0042 block 3 197.0039333 65.6679778 9.12 0.0011 Source DF Type III SS Mean Square F Value Pr > F trt 5 201.3163833 40.2632767 5.59 0.0042 block 3 197.0039333 65.6679778 9.12 0.0011 Kuehl -- Example 8.1 -- Nitrate Nitrogen The GLM Procedure Dunnett's t Tests for nitrate NOTE: This test controls the Type I experimentwise error for comparisons of all treatments against a control. Alpha 0.05 Error Degrees of Freedom 15 Error Mean Square 7.200561 Critical Value of Dunnett's t 2.81610 Minimum Significant Difference 5.3434 Comparisons significant at the 0.05 level are indicated by ***. Difference Simultaneous trt Between 95% Confidence Comparison Means Limits 3 - 4 6.155 0.812 11.498 *** 2 - 4 3.418 -1.926 8.761 6 - 4 2.610 -2.733 7.953 5 - 4 -1.105 -6.448 4.238 1 - 4 -2.337 -7.681 3.006