condition mean min max ZT0-3 38.70256666666666 24.30945 45.9922 ZT4-7 24.20645 24.20645 24.20645 ZT8-11 30.20725 30.20725 30.20725 ZT12-15 40.310900000000004 38.08545 42.53635 ZT16-19 47.21475 47.21475 47.21475 ZT20-23 58.956199999999995 58.956199999999995 58.956199999999995