condition mean min max ZT0-3 230.3 230.3 230.3 ZT4-7 269.5 269.5 269.5 ZT8-11 154.4 154.4 154.4 ZT12-15 143.4 143.4 143.4 ZT16-19 160.95 160.95 160.95 ZT20-23 171.5 171.5 171.5