Classify each of the following qualitative variables as ordinal or nominative. Qualitative Variable Categories Statistics course letter grade ABCDF Door choice on Let's Make A Deal Door #1 Door #2 Door #3 Television show classifications TV-G TV-PG TV-14 TV-MA Personal computer ownership Yes No Restaurant rating * * * * * Income tax filing status Married filing jointly; Married filing separately; Single; Head of household; Qualifying widow(er)