condition mean min max ZT0-3 0.88434525 0.8271440000000001 0.9415465 ZT4-7 1.17665 1.17665 1.17665 ZT8-11 0.9700344999999999 0.9700344999999999 0.9700344999999999 ZT12-15 0 0 0 ZT16-19 0.694375 0.694375 0.694375 ZT20-23 1.18953 1.18953 1.18953