Key Concepts

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Structurally Missing Data

Structurally Missing Data is data that is expected to be missing.

For example, there are structurally missing data in the ‘Litters’ and ‘Pups/Litter’ columns for all the male dogs in the table below because we would not expect male dogs to have puppies.

ID# Name Breed Sex Litters Pups/Litter
1 Gnasher ACD M
2 Cassie Collie F 1 3
3 Pepper French Bulldog F 4 2
4 Jed Golden Retreiver M
5 Henry Spaniel M
6 Ruby ACD F 1 6