Parameter 2D method 2DD method Chemometric methods     manfacturer method(b)
      CLS PCR PLS  
Mean 99.97 99.83 99.46 99.00 99.77 99.76
SD 1.50 1.40 2.69 1.51 1.32 1.32
N 6 7 8 8 8 5
Variance 2.26 1.96 7.24 2.28 1.75 1.75
Student's t 0.24(2.26)a 0.08(2.26)a 0.26(1.79) 0.96(1.81) 0.69(1.85)  
F 1.29(6.25)a 1.12(6.16)a 4.15(6.09) 1.31(6.09) 1.30(4.12)  
a These values represent the corresponding tabulated values of t & F at P=0.05
b spectrophotometric method  
Table 8: (Statistical analysis of the results obtained by applying the proposed methods and reported method for the analysis of pure powder Nx).