condition mean min max ZT0-3 13.0 13.0 13.0 ZT4-7 7.4 7.4 7.4 ZT8-11 45.05 45.05 45.05 ZT12-15 7.3 7.3 7.3 ZT16-19 4.9 4.9 4.9 ZT20-23 11.600000000000001 11.600000000000001 11.600000000000001