condition mean min max ZT0-3 0.192482472 0.17818337199999998 0.206781572 ZT4-7 0.14802353025 0.13750279850000002 0.158544262 ZT8-11 0.28378892675 0.2397496105 0.32782824299999996 ZT12-15 0.90316057475 0.627870232 1.1784509175 ZT16-19 1.0963699655 0.919709001 1.27303093 ZT20-23 0.960709767 0.855358793 1.066060741