Sums of Squares (SS) Degree of Freedom (dF) Mean Squares (SS/df) (MS) F-statistic Prob>F (p)
  Amphetamine
Columns 65.9156 18 3.66198 13902.48 5.24361e-097
Error 0.015 57 0.00026    
Total 65.9307 75      
  Methamphetamine
Columns 449.216 18 24.9564 106918.78 2.97059e-122
Error 0.013 57 0.0002    
Total 449.229 75      
  MDMA
Columns 452.88 18 25.16 187006.79 3.57393e-129
Error 0.008 57 0.0001    
Total 452.887 75      
Table 4: Results of ANOVA analysis.