condition mean min max ZT0-3 60.878924999999995 55.8495 65.90835 ZT4-7 82.96865 82.96865 82.96865 ZT8-11 96.07669999999999 96.07669999999999 96.07669999999999 ZT12-15 0 0 0 ZT16-19 117.09299999999999 117.09299999999999 117.09299999999999 ZT20-23 74.17935 74.17935 74.17935