condition mean min max ZT0-3 797.85 797.85 797.85 ZT4-7 131.5 131.5 131.5 ZT8-11 391.95 391.95 391.95 ZT12-15 2769.0499999999997 2769.0499999999997 2769.0499999999997 ZT16-19 4058.8500000000004 4058.8500000000004 4058.8500000000004 ZT20-23 2056.6 2056.6 2056.6