condition mean min max ZT0-3 2407.7 2407.7 2407.7 ZT4-7 1764.2 1764.2 1764.2 ZT8-11 1751.9499999999998 1751.9499999999998 1751.9499999999998 ZT12-15 2365.6499999999996 2365.6499999999996 2365.6499999999996 ZT16-19 2149.95 2149.95 2149.95 ZT20-23 2240.6 2240.6 2240.6