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 0.05327223649999999 0.0 0.10654447299999999 ZT20-23 0.11518824433333331 0.0 0.23037648866666663