condition mean min max ZT0-3 6.05 6.05 6.05 ZT4-7 27.5 27.5 27.5 ZT8-11 10.0 10.0 10.0 ZT12-15 8.55 8.55 8.55 ZT16-19 11.3 11.3 11.3 ZT20-23 31.150000000000002 31.150000000000002 31.150000000000002