Which of the following is the correct formula for total variation?

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Statistical inference is the process of drawing conclusions about a population based on a sample of data. Regression analysis is a set of statistical processes that estimate the relationships between variables.
Topics include: Introduction to Statistical Inference, Probability and Statistics, Common Distributions, Likelihood, Statistical Inference Concepts, Introduction to Regression Models, Residual Variation and Multivariate, Binary and Count Outcomes.

 


Which of the following is the correct formula for total variation?