condition mean min max ZT0-3 77.86174862499999 41.668944249999996 114.054553 ZT4-7 18.277504657499996 17.025450014999997 19.5295593 ZT8-11 19.445888975000003 16.91473252 21.97704543 ZT12-15 12.06202829075 9.665989382 14.4580671995 ZT16-19 9.84101394825 9.128833563 10.553194333499999 ZT20-23 14.4609764625 14.14406167 14.777891255