condition mean min max ZT0-3 12.2458 11.19815 13.29345 ZT4-7 18.45975 18.45975 18.45975 ZT8-11 21.378950000000003 21.378950000000003 21.378950000000003 ZT12-15 0 0 0 ZT16-19 16.627200000000002 16.627200000000002 16.627200000000002 ZT20-23 14.0016 14.0016 14.0016