condition mean min max ZT0-3 0.0105916 0.0 0.0317748 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.11411402500000001 0.095232 0.13299605 ZT16-19 0.061982899999999994 0.061982899999999994 0.061982899999999994 ZT20-23 0.0 0.0 0.0