condition mean min max ZT0-3 11.177392 11.177392 11.177392 ZT4-7 11.665982 11.665982 11.665982 ZT8-11 10.8883835 10.8883835 10.8883835 ZT12-15 11.006713 11.006713 11.006713 ZT16-19 11.159657 11.159657 11.159657 ZT20-23 11.109301 11.109301 11.109301