condition mean min max ZT0-3 0.08679372499999999 0.02917545 0.14441199999999998 ZT4-7 0.20520650000000001 0.20520650000000001 0.20520650000000001 ZT8-11 0.7629935 0.7629935 0.7629935 ZT12-15 0 0 0 ZT16-19 0.401609 0.401609 0.401609 ZT20-23 0.3460215 0.3460215 0.3460215