Nkọwa dị mkpirikpi:
SQUARE kọlụm kwụ ọtọ igwe: 1. Tebụl nke Z5140B, Z5150B na ofu na Z5140B-1, Z5150B-1 bụ cross table.2. Nke a igwe nwekwara ike gbasaa oghere, igwu miri emi oghere, ịme ọpịpị, na-agwụ ike na wdg ma e wezụga mkpọpu oghere.3. Nke a usoro igwe nwere ọtụtụ uru, dị ka elu arụmọrụ, ezi isiike, elu nkenke, ala mkpọtụ, obosara ọsọ nso .. igwe nke nwere cross table, na tebụl nwere ike ...