condition mean min max ZT0-3 0.12358516666666666 0.0969499 0.140947 ZT4-7 0.10490364999999999 0.10490364999999999 0.10490364999999999 ZT8-11 0.12953350000000002 0.12953350000000002 0.12953350000000002 ZT12-15 0.27010275 0.2232805 0.316925 ZT16-19 0.32855599999999996 0.32855599999999996 0.32855599999999996 ZT20-23 0.2065605 0.2065605 0.2065605