Fill in the blank: If a dataset contains _____, this is an indication that those values do not exist in the dataset.

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Multiple Choice

Fill in the blank: If a dataset contains _____, this is an indication that those values do not exist in the dataset.

Null values indicate missing data—the absence of a value in a field. When a dataset contains nulls, it signals that those positions do not have a recorded value, either because the information wasn’t collected, isn’t applicable, or is unknown. Zeros can be real measurements, so they don’t inherently mean “no data.” Outliers are extreme values, not indications of nonexistence, and duplicates are repeated records. So nulls are the best fit because they explicitly represent missing or non-recorded information.

Null values indicate missing data—the absence of a value in a field. When a dataset contains nulls, it signals that those positions do not have a recorded value, either because the information wasn’t collected, isn’t applicable, or is unknown. Zeros can be real measurements, so they don’t inherently mean “no data.” Outliers are extreme values, not indications of nonexistence, and duplicates are repeated records. So nulls are the best fit because they explicitly represent missing or non-recorded information.

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