condition mean min max ZT0-3 239.45 239.45 239.45 ZT4-7 247.0 247.0 247.0 ZT8-11 302.5 302.5 302.5 ZT12-15 234.95 234.95 234.95 ZT16-19 185.45000000000002 185.45000000000002 185.45000000000002 ZT20-23 222.95 222.95 222.95