condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.042202427 0.021308894666666665 0.06309595933333334 ZT20-23 0.0437542705 0.0 0.087508541