An Empirical Study of Hybrid DEA and Grey System Theory on Analyzing Performance: A Case from Indian Mining Industry

Table 12

Paired samples test.

	Paired differences						df	Sig. (2-tailed)
	Mean	Std. deviation	Std. error mean	95% confidence interval of the difference
				Lower	Upper
Nonradial-radial	−2.39159063	5.58656757	1.16487986	−4.80740361	2.42223412