question archive Explain what is measured by each of the following: sum of squares (SS), variance, and standard deviation

Explain what is measured by each of the following: sum of squares (SS), variance, and standard deviation

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Explain what is measured by each of the following: sum of squares (SS), variance, and standard deviation. Why is it essential to understand the difference between sample statistics and population parameters (e.g., when to use n-1 when calculating variance)? 

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