condition mean min max ZT0-3 0.446469 0.446469 0.446469 ZT4-7 0.23094550000000003 0.23094550000000003 0.23094550000000003 ZT8-11 0.1762245 0.1762245 0.1762245 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.125457 0.125457 0.125457