condition mean min max ZT0-3 217.5 217.5 217.5 ZT4-7 258.4 258.4 258.4 ZT8-11 306.25 306.25 306.25 ZT12-15 376.0 376.0 376.0 ZT16-19 283.15 283.15 283.15 ZT20-23 216.9 216.9 216.9