condition mean min max ZT0-3 1770.15 1770.15 1770.15 ZT4-7 2306.8 2306.8 2306.8 ZT8-11 1996.4499999999998 1996.4499999999998 1996.4499999999998 ZT12-15 1634.35 1634.35 1634.35 ZT16-19 1381.45 1381.45 1381.45 ZT20-23 1527.15 1527.15 1527.15