condition mean min max ZT0-3 233.33749999999998 233.33749999999998 233.33749999999998 ZT4-7 229.26850000000002 229.26850000000002 229.26850000000002 ZT8-11 188.1825 188.1825 188.1825 ZT12-15 193.587 193.587 193.587 ZT16-19 175.791 175.791 175.791 ZT20-23 208.55200000000002 208.55200000000002 208.55200000000002