Which of the following statements are correct? Select one or more:
a. When an interval variable has very few categories, we could use a frequency table to describe its
distribution
b. The cumulative percentage column is only useful when we are describing ordinal variables.
c. The valid percent column in a frequency table shows us the percentage for each category on the
basis of all units in the dataset.
d. In a frequency table, the column that the frequency count for each category is the most important
column to help us describe a categorical variable.