condition mean min max ZT0-3 10.2151175 10.11505 10.315185 ZT4-7 7.72447 7.72447 7.72447 ZT8-11 7.838385 7.838385 7.838385 ZT12-15 0 0 0 ZT16-19 10.8858 10.8858 10.8858 ZT20-23 12.0487 12.0487 12.0487