condition mean min max ZT0-3 11.430724999999999 10.6743 12.187149999999999 ZT4-7 9.281315 9.281315 9.281315 ZT8-11 9.29636 9.29636 9.29636 ZT12-15 0 0 0 ZT16-19 11.1007 11.1007 11.1007 ZT20-23 9.958189999999998 9.958189999999998 9.958189999999998