condition mean min max ZT0-3 72.55000000000001 72.55000000000001 72.55000000000001 ZT4-7 59.0 59.0 59.0 ZT8-11 30.7 30.7 30.7 ZT12-15 47.45 47.45 47.45 ZT16-19 88.7 88.7 88.7 ZT20-23 56.6 56.6 56.6