Consider a two-way frequency table. Which of the following statements are true? Select all that apply.
A. The sum of all joint frequencies in a column equals the marginal frequency at the bottom of the column.
B. The sum of all joint frequencies equals the total frequency.
C. The sum of all marginal frequencies equals the total frequency.
D. A relative frequency is the ratio of a joint frequency and a marginal frequency.
E. The sum of all marginal frequencies in a row equals the total frequency.