condition mean min max ZT0-3 0.023404499999999998 0.0 0.0702135 ZT4-7 0.0 0.0 0.0 ZT8-11 0.1412475 0.1412475 0.1412475 ZT12-15 0.03303175 0.0 0.0660635 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0855085 0.0855085 0.0855085