condition mean min max ZT0-3 0.1560435 0.0 0.312087 ZT4-7 0.1881475 0.1881475 0.1881475 ZT8-11 0.44598150000000003 0.44598150000000003 0.44598150000000003 ZT12-15 0 0 0 ZT16-19 1.1277245 1.1277245 1.1277245 ZT20-23 0.566998 0.566998 0.566998