condition mean min max ZT0-3 14.2967 14.2967 14.2967 ZT4-7 12.954149999999998 12.954149999999998 12.954149999999998 ZT8-11 12.983 12.983 12.983 ZT12-15 15.033199999999999 15.033199999999999 15.033199999999999 ZT16-19 16.26915 16.26915 16.26915 ZT20-23 13.9947 13.9947 13.9947