Question

classify each as nominal - level, ordinal - level, interval - level, or ratio - level measurement. blood types - o, a, b, ab. options: ordinal, nominal, ratio, interval

Explanation:

Nominal - level measurement involves categorizing data into distinct groups with no inherent order or ranking. Blood types (O, A, B, AB) are just categories with no order (e.g., A is not "more" or "less" than O in a meaningful ordered way), so they are nominal. Ordinal has order, interval has equal intervals and no true zero, ratio has equal intervals and a true zero; these don't apply here.

Answer:

B. Nominal