condition mean min max ZT0-3 41.095475 36.670950000000005 45.519999999999996 ZT4-7 37.91765 37.91765 37.91765 ZT8-11 43.84845 43.84845 43.84845 ZT12-15 0 0 0 ZT16-19 43.580349999999996 43.580349999999996 43.580349999999996 ZT20-23 45.104749999999996 45.104749999999996 45.104749999999996