condition mean min max ZT0-3 14.78915 14.78915 14.78915 ZT4-7 15.174700000000001 15.174700000000001 15.174700000000001 ZT8-11 9.39761 9.39761 9.39761 ZT12-15 10.1121 10.1121 10.1121 ZT16-19 11.61215 11.61215 11.61215 ZT20-23 12.19965 12.19965 12.19965