condition mean min max ZT0-3 0.595655 0.123797 0.97943 ZT4-7 0.174005 0.174005 0.174005 ZT8-11 0.1798725 0.1798725 0.1798725 ZT12-15 1.14304575 0.9376265 1.348465 ZT16-19 1.1215505000000001 1.1215505000000001 1.1215505000000001 ZT20-23 0.549165 0.549165 0.549165