condition mean min max ZT0-3 13.868 13.868 13.868 ZT4-7 11.37255 11.37255 11.37255 ZT8-11 11.16055 11.16055 11.16055 ZT12-15 15.27345 15.27345 15.27345 ZT16-19 15.32225 15.32225 15.32225 ZT20-23 12.91095 12.91095 12.91095