condition mean min max ZT0-3 13.120000000000001 13.120000000000001 13.120000000000001 ZT4-7 8.360385 8.360385 8.360385 ZT8-11 5.84346 5.84346 5.84346 ZT12-15 6.8666 6.8666 6.8666 ZT16-19 15.5636 15.5636 15.5636 ZT20-23 13.34765 13.34765 13.34765