condition mean min max ZT0-3 257.9 257.9 257.9 ZT4-7 185.5 185.5 185.5 ZT8-11 172.05 172.05 172.05 ZT12-15 283.9 283.9 283.9 ZT16-19 259.65 259.65 259.65 ZT20-23 217.85 217.85 217.85