condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0103763 0.0103763 0.0103763 ZT8-11 0.0849689 0.0849689 0.0849689 ZT12-15 0.066091 0.066091 0.066091 ZT16-19 0.0 0.0 0.0 ZT20-23 0.09937649999999999 0.09937649999999999 0.09937649999999999