condition mean min max ZT0-3 0.0235188 0.0235188 0.0235188 ZT4-7 0.0327328 0.0327328 0.0327328 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 0.0 0.0 0.0