condition mean min max ZT0-3 0.0360135895 0.0 0.072027179 ZT4-7 0.01091673 0.0 0.02183346 ZT8-11 0.06226747 0.0 0.12453494 ZT12-15 0.06848821699999999 0.0 0.13697643399999998 ZT16-19 0.0 0.0 0.0 ZT20-23 0.091327091 0.04278067633333333 0.13987350566666668