condition mean min max ZT0-3 0.41673150000000003 0.28422400000000003 0.549239 ZT4-7 0.443172 0.443172 0.443172 ZT8-11 0.5998645 0.5998645 0.5998645 ZT12-15 0 0 0 ZT16-19 0.642639 0.642639 0.642639 ZT20-23 0.38757050000000004 0.38757050000000004 0.38757050000000004