condition mean min max ZT0-3 19.027675000000002 18.6262 19.42915 ZT4-7 10.8214 10.8214 10.8214 ZT8-11 13.882249999999999 13.882249999999999 13.882249999999999 ZT12-15 0 0 0 ZT16-19 16.61325 16.61325 16.61325 ZT20-23 18.50175 18.50175 18.50175