condition mean min max ZT0-3 0.25099 0.2174735 0.2845065 ZT4-7 2.033475 2.033475 2.033475 ZT8-11 3.45643 3.45643 3.45643 ZT12-15 0 0 0 ZT16-19 1.888795 1.888795 1.888795 ZT20-23 1.111615 1.111615 1.111615