condition mean min max ZT0-3 102.769937 102.769937 102.769937 ZT4-7 105.90238049999999 105.90238049999999 105.90238049999999 ZT8-11 57.785979 57.785979 57.785979 ZT12-15 143.60868 143.60868 143.60868 ZT16-19 77.1401195 77.1401195 77.1401195 ZT20-23 204.6830455 204.6830455 204.6830455