condition mean min max ZT0-3 0.703814 0.5855790000000001 0.822049 ZT4-7 1.229365 1.229365 1.229365 ZT8-11 3.8376449999999998 3.8376449999999998 3.8376449999999998 ZT12-15 0 0 0 ZT16-19 3.643395 3.643395 3.643395 ZT20-23 2.45695 2.45695 2.45695