condition mean min max ZT0-3 30.031999999999996 28.46025 31.603749999999998 ZT4-7 41.8434 41.8434 41.8434 ZT8-11 100.14525 100.14525 100.14525 ZT12-15 0 0 0 ZT16-19 85.2765 85.2765 85.2765 ZT20-23 48.028549999999996 48.028549999999996 48.028549999999996