condition mean min max ZT0-3 17.16355 17.0828 17.244300000000003 ZT4-7 18.205399999999997 18.205399999999997 18.205399999999997 ZT8-11 23.081 23.081 23.081 ZT12-15 0 0 0 ZT16-19 24.75485 24.75485 24.75485 ZT20-23 20.6786 20.6786 20.6786