condition mean min max ZT0-3 1121.3 1121.3 1121.3 ZT4-7 1304.6 1304.6 1304.6 ZT8-11 1292.65 1292.65 1292.65 ZT12-15 691.7 691.7 691.7 ZT16-19 858.9499999999999 858.9499999999999 858.9499999999999 ZT20-23 1086.5 1086.5 1086.5