Marginal distribution (or marginal probability) describes the likelihood of a single event to occur. While you might record multiple events or variables, marginal distribution ignores the other variable and just examines the probability of that one event happening.

For example, you might track data like the chart below. Marginal distribution just looks at the likelihood that someone was a homeowner and would ignore the pet parent information or would only look at pet parent information and ignore the homeownership.

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