If an additional variable,however irrelevant,is added to a multiple regression model,what is the most likely result?

Name: If an additional variable,however irrelevant,is added to a multiple regression model,what is the most likely result?
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Quizplus · Accepted Answer

Adding an additional variable to a multiple regression model, regardless of its relevance, typically results in a smaller sum of squared errors because the model has more parameters to adjust to the data, potentially capturing more variance.

If an Additional Variable,however Irrelevant,is Added to a Multiple Regression