Parameters Densitometric method Fluorimetric method Reference methoda
Mean % 99.07 100.04 98.9
SD 0.57 0.99 1.02
Variance 0.33 0.98 1.04
N 5 5 5
t-test (2.31)b 0.33 1.05  
F-test (6.39)b 3.15 1.06  
aReference method is the company method,
b Figures in parenthesis are the theoretical values of t and F at p=0.05
Table 3: Statistical analysis of the result obtained by the proposed procedures and reported procedure for the determination of zaleplon in its pharmaceutical formulation.