condition mean min max ZT0-3 0.187362 0.0414773 0.3009165 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0851935 0.0851935 0.0851935 ZT12-15 0.24175475000000002 0.1776915 0.30581800000000003 ZT16-19 0.0412995 0.0412995 0.0412995 ZT20-23 0.0 0.0 0.0