condition mean min max ZT0-3 15.818100000000001 15.818100000000001 15.818100000000001 ZT4-7 11.11035 11.11035 11.11035 ZT8-11 10.48115 10.48115 10.48115 ZT12-15 19.5948 19.5948 19.5948 ZT16-19 21.6784 21.6784 21.6784 ZT20-23 18.4662 18.4662 18.4662