Group1	Group2	Group1 mean	Group1 std	Group2 mean	Group2 std	t stat	p-value
firm	NA	9.86222384211	1.2044302013	10.4075138	0.628081850363	-0.936327604549	1.0
NA	bact	10.4075138	0.628081850363	10.4051651905	1.36801434832	0.003710057367	1.0
firm	bact	9.86222384211	1.2044302013	10.4051651905	1.36801434832	-1.46395297866	0.459
