condition mean min max ZT0-3 75.80000000000001 75.80000000000001 75.80000000000001 ZT4-7 75.5 75.5 75.5 ZT8-11 87.05 87.05 87.05 ZT12-15 74.9 74.9 74.9 ZT16-19 59.1 59.1 59.1 ZT20-23 72.9 72.9 72.9