condition mean min max ZT0-3 27.161050000000003 27.161050000000003 27.161050000000003 ZT4-7 15.333185 15.333185 15.333185 ZT8-11 14.190850000000001 14.190850000000001 14.190850000000001 ZT12-15 22.59975 22.59975 22.59975 ZT16-19 38.5711 38.5711 38.5711 ZT20-23 27.6806 27.6806 27.6806