condition mean min max ZT0-3 88.69999999999999 88.69999999999999 88.69999999999999 ZT4-7 59.7 59.7 59.7 ZT8-11 88.9 88.9 88.9 ZT12-15 87.1 87.1 87.1 ZT16-19 80.0 80.0 80.0 ZT20-23 69.0 69.0 69.0