condition mean min max ZT0-3 3.5271325 3.2046099999999997 3.8496550000000003 ZT4-7 2.395915 2.395915 2.395915 ZT8-11 8.701975000000001 8.701975000000001 8.701975000000001 ZT12-15 0 0 0 ZT16-19 7.148575 7.148575 7.148575 ZT20-23 4.462695 4.462695 4.462695