Question: 4. We say that R2 is a sample statistic and not a population parameter. What do we mean by this? If it is a sample

4. We say that R2 is a sample statistic and not

4. We say that R2 is a sample statistic and not a population parameter. What do we mean by this? If it is a sample statistic and not an estimate of a population parameter, what use is it? That is, why do we use R2

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