condition mean min max ZT0-3 9.5 9.5 9.5 ZT4-7 10.3 10.3 10.3 ZT8-11 16.35 16.35 16.35 ZT12-15 8.65 8.65 8.65 ZT16-19 10.7 10.7 10.7 ZT20-23 12.350000000000001 12.350000000000001 12.350000000000001