condition mean min max ZT0-3 0.7455618333333333 0.623429 0.928904 ZT4-7 0.578841 0.578841 0.578841 ZT8-11 0.6429885 0.6429885 0.6429885 ZT12-15 1.262511 1.0565769999999999 1.468445 ZT16-19 0.979764 0.979764 0.979764 ZT20-23 1.104575 1.104575 1.104575