condition mean min max ZT0-3 0.562066752 0.36922533799999996 0.7549081660000001 ZT4-7 2.0335181515 1.893770189 2.173266114 ZT8-11 2.11400386325 1.8417678455000002 2.386239881 ZT12-15 7.07081440975 4.6389312955 9.502697524 ZT16-19 9.52470560975 8.5617064395 10.48770478 ZT20-23 15.3281699525 13.626514645 17.02982526