condition mean min max ZT0-3 0.382292 0.0 0.757865 ZT4-7 0.385024 0.385024 0.385024 ZT8-11 0.779705 0.779705 0.779705 ZT12-15 0.2120755 0.0 0.424151 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0