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.