condition mean min max ZT0-3 0.8901709999999999 0.6023505 1.3164069999999999 ZT4-7 0.342363 0.342363 0.342363 ZT8-11 0.203597 0.203597 0.203597 ZT12-15 0.3893995 0.1631885 0.6156105000000001 ZT16-19 0.519935 0.519935 0.519935 ZT20-23 0.396048 0.396048 0.396048