condition mean min max ZT0-3 13.31995 13.31995 13.31995 ZT4-7 9.48597 9.48597 9.48597 ZT8-11 11.32475 11.32475 11.32475 ZT12-15 14.551649999999999 14.551649999999999 14.551649999999999 ZT16-19 15.9833 15.9833 15.9833 ZT20-23 13.8905 13.8905 13.8905