condition mean min max ZT0-3 32.8027 32.8027 32.8027 ZT4-7 26.15105 26.15105 26.15105 ZT8-11 33.3038 33.3038 33.3038 ZT12-15 30.011 30.011 30.011 ZT16-19 38.277249999999995 38.277249999999995 38.277249999999995 ZT20-23 32.51215 32.51215 32.51215