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In a Simple linear regression analysis with 22 observations, the total sum of squares equal 1600 and the variance was 30. How much of the

In a Simple linear regression analysis with 22 observations, the total sum of squares equal 1600 and the variance was 30. How much of the total variability if being explained by the model?

*I am confused on how to calculated the R-squared, would really appreciate an explanation!!*

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