condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0043095 0.0 0.008619 ZT16-19 0.006532533333333333 0.0 0.013065066666666666 ZT20-23 0 0 0