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 0.0 0.0 0.0 ZT16-19 0.118588847 0.08805443433333333 0.14912325966666665 ZT20-23 0.0 0.0 0.0