condition mean min max ZT0-3 288.9 288.9 288.9 ZT4-7 316.0 316.0 316.0 ZT8-11 346.9 346.9 346.9 ZT12-15 281.9 281.9 281.9 ZT16-19 239.3 239.3 239.3 ZT20-23 238.45 238.45 238.45