Table 26.

Values of iris database.

Method	N	Mean	Standard deviation	Error standard deviation of the mean	Estimated difference	t-value	P value	Degree of freedom
Sánchez and Melin [44]	20	98.68	0.779	0.17	−0.624	−3.18	0.0035	29
Proposed method	20	99.30	0.407	0.091
Sánchez et al. [37]	20	98.22	0.758	0.17	−1.083	−5.62	1.8623E − 06	38
Proposed method	20	99.30	0.407	0.091