condition mean min max ZT0-3 56.330955 56.330955 56.330955 ZT4-7 64.334953 64.334953 64.334953 ZT8-11 55.974337 55.974337 55.974337 ZT12-15 69.88212999999999 69.88212999999999 69.88212999999999 ZT16-19 85.0668625 85.0668625 85.0668625 ZT20-23 80.49022099999999 80.49022099999999 80.49022099999999