condition mean min max ZT0-3 0.8666885 0.8666885 0.8666885 ZT4-7 0.358155 0.358155 0.358155 ZT8-11 0.667628 0.667628 0.667628 ZT12-15 0.41809050000000003 0.41809050000000003 0.41809050000000003 ZT16-19 0.428354 0.428354 0.428354 ZT20-23 0.7027030000000001 0.7027030000000001 0.7027030000000001