condition mean min max ZT0-3 22.9 22.9 22.9 ZT4-7 25.4 25.4 25.4 ZT8-11 5.3 5.3 5.3 ZT12-15 10.3 10.3 10.3 ZT16-19 5.5 5.5 5.5 ZT20-23 14.350000000000001 14.350000000000001 14.350000000000001