condition mean min max ZT0-3 0.10879716666666667 0.0 0.3263915 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.5319165 0.3646915 0.6991415 ZT16-19 0.0 0.0 0.0 ZT20-23 0.366464 0.366464 0.366464