condition mean min max ZT0-3 77.69999999999999 77.69999999999999 77.69999999999999 ZT4-7 103.8 103.8 103.8 ZT8-11 48.85 48.85 48.85 ZT12-15 86.75 86.75 86.75 ZT16-19 116.05 116.05 116.05 ZT20-23 108.75 108.75 108.75