condition mean min max ZT0-3 110.5 110.5 110.5 ZT4-7 85.7 85.7 85.7 ZT8-11 84.35 84.35 84.35 ZT12-15 100.5 100.5 100.5 ZT16-19 77.69999999999999 77.69999999999999 77.69999999999999 ZT20-23 59.349999999999994 59.349999999999994 59.349999999999994