Group1	Group2	Group1 mean	Group1 std	Group2 mean	Group2 std	t stat	p-value
firm	NA	0.798155155263	0.0515854478749	0.877248793125	0.0354120981459	-3.09613226474	0.021
NA	bact	0.877248793125	0.0354120981459	0.862145335938	0.0510568989551	0.629465071219	1.0
firm	bact	0.798155155263	0.0515854478749	0.862145335938	0.0510568989551	-4.44378927444	0.003
