condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.20107299999999997 0.20107299999999997 0.20107299999999997 ZT8-11 1.218638 1.218638 1.218638 ZT12-15 0.41365625 0.287786 0.5395265 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0