condition mean min max ZT0-3 8.855609999999999 8.729894999999999 8.981325 ZT4-7 7.441715 7.441715 7.441715 ZT8-11 4.8703199999999995 4.8703199999999995 4.8703199999999995 ZT12-15 0 0 0 ZT16-19 9.182034999999999 9.182034999999999 9.182034999999999 ZT20-23 9.631775000000001 9.631775000000001 9.631775000000001