condition mean min max ZT0-3 1187.6 1187.6 1187.6 ZT4-7 696.9 696.9 696.9 ZT8-11 812.2 812.2 812.2 ZT12-15 1006.9000000000001 1006.9000000000001 1006.9000000000001 ZT16-19 1284.55 1284.55 1284.55 ZT20-23 1426.1 1426.1 1426.1