condition mean min max ZT0-3 2.2179275 1.5619299999999998 2.873925 ZT4-7 1.3594519999999999 1.3594519999999999 1.3594519999999999 ZT8-11 3.03105 3.03105 3.03105 ZT12-15 0 0 0 ZT16-19 9.498615 9.498615 9.498615 ZT20-23 4.629655 4.629655 4.629655