condition mean min max ZT0-3 55.651383333333335 31.561999999999998 71.1821 ZT4-7 30.0131 30.0131 30.0131 ZT8-11 33.2389 33.2389 33.2389 ZT12-15 59.6802 54.295249999999996 65.06515 ZT16-19 66.6241 66.6241 66.6241 ZT20-23 86.7804 86.7804 86.7804