condition mean min max ZT0-3 14.95 14.95 14.95 ZT4-7 10.2 10.2 10.2 ZT8-11 33.8 33.8 33.8 ZT12-15 9.2 9.2 9.2 ZT16-19 8.0 8.0 8.0 ZT20-23 12.600000000000001 12.600000000000001 12.600000000000001