The second most common variable set structure is ordinal - multi, which consists of a set of related ordinal variables. These commonly arise in survey research, where the survey questions are variously referred to as multi-item scales and batteries. For example, an ordinal - multi variable set is required to represent the data from the following survey questions:
Q4a. Which of the following statements best describes how you feel about Coca-Cola?
Hate
Dislike
Neither like nor dislike
Like
Love
Q4b. Which of the following statements best describes how you feel about Diet Coke?
Hate
Dislike
Neither like nor dislike
Like
Love
Q4c. Which of the following statements best describes how you feel about Pepsi?
Hate
Dislike
Neither like nor dislike
Like
Love
Often, ordinal - multi data is originally created from Nominal-Ordinal Data, with Don't know set as missing data.
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