condition mean min max ZT0-3 288.4 288.4 288.4 ZT4-7 221.5 221.5 221.5 ZT8-11 199.3 199.3 199.3 ZT12-15 249.35 249.35 249.35 ZT16-19 259.7 259.7 259.7 ZT20-23 244.5 244.5 244.5