condition mean min max ZT0-3 7.127537982750001 6.836097408500001 7.418978557000001 ZT4-7 1.8148527997500001 1.2543100255 2.375395574 ZT8-11 2.1637883457499996 1.4844207919999999 2.8431558994999997 ZT12-15 6.20762375375 4.1787359075 8.2365116 ZT16-19 6.08734104925 5.563156405999999 6.6115256925 ZT20-23 9.23478184375 8.7682156275 9.70134806