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Vocabulary

Understand the term. Connect the concept.

A practical dictionary of 512 AI, machine learning, mathematics, and programming terms from HerbDev’s AI Vocabulary app. Start with a definition, explore an example, then follow the concepts behind it.

Linked concepts open in a new tab. Audio reads the definition and example.

Missing Value

Data & Datasets · Level 2 of 5

Missing Value

An absent or unknown entry in a dataset.

Missingness mechanisms can affect whether simple replacement is valid.

Example

A sensor fails to record a temperature at one timestamp.

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Audio transcript

Missing Value. An absent or unknown entry in a dataset. Missingness mechanisms can affect whether simple replacement is valid. For example: A sensor fails to record a temperature at one timestamp.

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This helps you prevent misleading experiments caused by data preparation and split mistakes.

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