condition mean min max ZT0-3 235.5 235.5 235.5 ZT4-7 297.3 297.3 297.3 ZT8-11 216.75 216.75 216.75 ZT12-15 202.5 202.5 202.5 ZT16-19 251.55 251.55 251.55 ZT20-23 235.85 235.85 235.85