condition mean min max ZT0-3 1.9043575000000001 1.488475 2.32024 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.419008 0.419008 0.419008 ZT20-23 2.0961585 2.0961585 2.0961585