In general, the constant that produces the smallest sum of squared deviations is always the sample average.

Name: In general, the constant that produces the smallest sum of squared deviations is always the sample average.
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Quizplus · Accepted Answer

This is known as the principle of least squares and it holds true for simple linear regression. For other regression models, such as polynomial regression, the constant that produces the smallest sum of squared deviations may not always be the sample average.

In General, the Constant That Produces the Smallest Sum of Squared