condition mean min max ZT0-3 6.173702499999999 6.025399999999999 6.322005 ZT4-7 5.622075 5.622075 5.622075 ZT8-11 9.206869999999999 9.206869999999999 9.206869999999999 ZT12-15 0 0 0 ZT16-19 8.61411 8.61411 8.61411 ZT20-23 7.264115 7.264115 7.264115