condition mean min max ZT0-3 78.58687499999999 70.044 87.12975 ZT4-7 71.70519999999999 71.70519999999999 71.70519999999999 ZT8-11 49.86175 49.86175 49.86175 ZT12-15 0 0 0 ZT16-19 43.0854 43.0854 43.0854 ZT20-23 59.29815 59.29815 59.29815