Drug name Recovery ± SD Calculated
t- values
Calculated
 F- values
Proposed methods Reference method  
Exforge® Aml. (%) 95.81± 0.83 95.79 ± 0.65 [26] 0.06 1.64
Val. (%) 97.46 ± 0.49 97.09 ± 0.51[26] 1.04 0.92
Losar
Mepha®

Ator®
Los. (%) 101.15 ± 0.95 101.10 ± 0.45 [21] 0.11 4.54
Ator. (%)  99.98 ± 1.35 100.65 ± 1.34 [21] 0.91 1.02
Caduet ® Aml. (%) 96.70 ± 0.61 96.68 ± 0.63 [22] 0.05 0.92
Ator. (%)  96.41 ± 0.26 96.93 ± 0.36 [22] 2.26 0.54
(Where the Tabulated t-values and F -ratios at p=0.05 are 2.57 and 5.05)[21,22,26] are the reference numbers of reported method used in the comparison
Table 6: Statistical comparison of the proposed and published methods for determination of Amlodipine besylate, Losartan potassium, Valsartan and Atorvastatin calcium respectively in their dosage forms by reported method (Tstudent test) and (F–test for variance).