condition mean min max ZT0-3 7.34096 7.34096 7.34096 ZT4-7 4.706105 4.706105 4.706105 ZT8-11 2.5787250000000004 2.5787250000000004 2.5787250000000004 ZT12-15 2.8171549999999996 2.8171549999999996 2.8171549999999996 ZT16-19 5.05273 5.05273 5.05273 ZT20-23 7.52005 7.52005 7.52005