condition mean min max ZT0-3 0.7262165 0.6651965 0.7872365 ZT4-7 0.7836705 0.7836705 0.7836705 ZT8-11 2.107235 2.107235 2.107235 ZT12-15 0 0 0 ZT16-19 2.26629 2.26629 2.26629 ZT20-23 0.860969 0.860969 0.860969