condition mean min max ZT0-3 33.806374999999996 31.20365 36.409099999999995 ZT4-7 57.2897 57.2897 57.2897 ZT8-11 33.6053 33.6053 33.6053 ZT12-15 0 0 0 ZT16-19 17.1871 17.1871 17.1871 ZT20-23 27.96815 27.96815 27.96815