condition mean min max ZT0-3 5.540425000000001 5.079035 6.001815000000001 ZT4-7 1.5338800000000001 1.5338800000000001 1.5338800000000001 ZT8-11 1.5201 1.5201 1.5201 ZT12-15 0 0 0 ZT16-19 0.4982035 0.4982035 0.4982035 ZT20-23 1.007615 1.007615 1.007615