condition mean min max ZT0-3 0.0346476 0.0346476 0.0346476 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 0.0 0.0 0.0 ZT20-23 0.026239949999999998 0.026239949999999998 0.026239949999999998