condition mean min max ZT0-3 0.07166943333333334 0.0 0.1741065 ZT4-7 0.03905455 0.03905455 0.03905455 ZT8-11 0.123439 0.123439 0.123439 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.08802935 0.08802935 0.08802935