condition mean min max ZT0-3 92.96792500000001 79.63885 106.297 ZT4-7 86.37995 86.37995 86.37995 ZT8-11 140.93200000000002 140.93200000000002 140.93200000000002 ZT12-15 0 0 0 ZT16-19 155.7945 155.7945 155.7945 ZT20-23 107.5015 107.5015 107.5015