condition mean min max ZT0-3 185.2346666666667 101.428 277.79600000000005 ZT4-7 74.06389999999999 74.06389999999999 74.06389999999999 ZT8-11 66.994 66.994 66.994 ZT12-15 104.6253 78.29509999999999 130.9555 ZT16-19 110.215 110.215 110.215 ZT20-23 190.70350000000002 190.70350000000002 190.70350000000002