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Advanced Placement (AP), 01.12.2020 08:20 kylieweeks052704
As part of the American Presidency Project, the annual State of the Union address has been analyzed going back to the first U. S. president. It turns out that the president’s use of the word America has increased in relative frequency over the years. Here is linear regression output for three different models, along with a residual plot for each model. Model 1 is based on the original data, while Models 2 and 3 involve transformations of the original data.
i. Which model does the best job of summarizing the relationship between president number and percent America? Explain your reasoning.
ii. Use the model chosen in part (a) to calculate and interpret the residual for the 45th president, Donald Trump, whose State of the Union address contained 1.73 percent America.
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