condition mean min max ZT0-3 1116.1999999999998 1116.1999999999998 1116.1999999999998 ZT4-7 1469.8 1469.8 1469.8 ZT8-11 1586.1 1586.1 1586.1 ZT12-15 1391.7 1391.7 1391.7 ZT16-19 1281.6 1281.6 1281.6 ZT20-23 1281.4 1281.4 1281.4