Fill in the blank: For observed and expected values,

i. The row totals in the observed table must be the same as the row totals in the expected table, but the column totals need not be the same.

ii. The column totals in the observed table must be the same as the column totals in the expected table, but the row totals need not be the same.

iii. Both the rowand the column totals in the observed table must be the same as the row and the column totals, respectively, in the expected table.

iv. Neither the row nor the column totals in the observed table need be the same as the row or the column totals in the expected table.