condition mean min max ZT0-3 258.2 258.2 258.2 ZT4-7 235.9 235.9 235.9 ZT8-11 188.75 188.75 188.75 ZT12-15 147.45 147.45 147.45 ZT16-19 237.7 237.7 237.7 ZT20-23 285.85 285.85 285.85