condition mean min max ZT0-3 2.312325 2.312325 2.312325 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.76275 0.76275 0.76275 ZT16-19 0.6942699999999999 0.6942699999999999 0.6942699999999999 ZT20-23 0.0 0.0 0.0