Which of the following is/are nominal data?
Nominal data is considered unordered categories. Sex answers fall into male or female which is unordered. Race can be multiple answers such as Caucasian, African American, Asian, etc which is unordered. Blood group can only have blood type O, A, B, or AB which is also unordered. Ordered, or ordinal data would have categories that are in some sort of order
http://www.bmj.com/about-bmj/resources-readers/publications/statistics-square-one
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