Simple Atomic Absorption Spectroscopic and Spectrophotometric Methods for Determination of Pioglitazone Hydrochloride and Carvedilol in Pharmaceutical Dosage Forms

Table 7

Statistical analysis of results obtained by Method B applied on Diabetin tablets and Carvid tablets compared with reported methods.

Parameters	Diabetin tablets			Carvid tablets
	Fast green FCF	Orange G	Reference method [12]	Fast green FCF	Orange G	Reference method [13]
𝑁	4	5	8	5	5	8
Mean; recovery	100.21	100.41	100.23	100.18	100.26	100.02
Variance	0.51	0.50	0.85	0.38	0.28	0.64
±SD	0.72	0.71	0.92	0.62	0.53	0.80
±RSD	0.72	0.71	0.92	0.62	0.53	0.80
±SE	0.36	0.32	0.33	0.28	0.24	0.28
Student’s 𝑡-test	0.038; (2.23)^a	0.41; (2.20)^a		1.33; (2.20)^a	0.59; (2.20)^a
𝐹-test	1.67; (4.35)^b	1.70; (4.12)^b		1.67; (4.12)^b	2.27; (4.12)^b

a and b are the theoretical student 𝑡-values and 𝐹-ratios at 𝑃=0.05.