Where you want each of the checked or unchecked boxes to appear, you will
need to have an If...then...Else... field construction that checks for the
content of the Ethnic_Origin field and inserts either a checked box or an
unchecked box as required.  For the boxes use the appropriate symbols from
the Insert>Symbols dialog

White                        { IF { MERGEFIELD Ethnic_Origin } = "White"
[checked Box] [unchecked Box ]}
Hispanic                    { IF { MERGEFIELD Ethnic_Origin } = "Hispanic"
[checked Box] [unchecked Box ]}
Black                        { IF { MERGEFIELD Ethnic_Origin } = "Black"
[checked Box] [unchecked Box ]}
Native American        { IF { MERGEFIELD Ethnic_Origin } = "Native American"
[checked Box] [unchecked Box ]}