condition mean min max ZT0-3 17.74305 17.64525 17.84085 ZT4-7 39.281400000000005 39.281400000000005 39.281400000000005 ZT8-11 38.027100000000004 38.027100000000004 38.027100000000004 ZT12-15 0 0 0 ZT16-19 32.2111 32.2111 32.2111 ZT20-23 29.84715 29.84715 29.84715