condition mean min max ZT0-3 0.481066 0.481066 0.481066 ZT4-7 0.409131 0.409131 0.409131 ZT8-11 0.29985150000000005 0.29985150000000005 0.29985150000000005 ZT12-15 0.4997355 0.4997355 0.4997355 ZT16-19 0.24949 0.24949 0.24949 ZT20-23 0.21313615 0.21313615 0.21313615