condition mean min max ZT0-3 83.9 83.9 83.9 ZT4-7 63.4 63.4 63.4 ZT8-11 65.05 65.05 65.05 ZT12-15 98.1 98.1 98.1 ZT16-19 98.69999999999999 98.69999999999999 98.69999999999999 ZT20-23 82.35 82.35 82.35