condition mean min max ZT0-3 1.4 1.4 1.4 ZT4-7 2.1 2.1 2.1 ZT8-11 0.9500000000000001 0.9500000000000001 0.9500000000000001 ZT12-15 0.9 0.9 0.9 ZT16-19 0.95 0.95 0.95 ZT20-23 5.1499999999999995 5.1499999999999995 5.1499999999999995