In Order to Calculate the Regression $R ^ { 2 }$

question 42

Essay

In order to calculate the regression $R ^ { 2 }$ you need the TSS and either the SSR or the ESS . The TSS is fairly straightforward to calculate, being just the variation of Y . However, if you had to calculate the SSR or ESS by hand (or in a spreadsheet), you would need all fitted values from the regression function and their deviations from the sample mean, or the residuals. Can you think of a quicker way to calculate the ESS simply using terms you have already used to calculate the slope coefficient?

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Definitions:

Fourth Amendment

The Fourth Amendment to the United States Constitution guarantees protection against unreasonable searches and seizures by the government, requiring warrants to be judicially sanctioned and supported by probable cause.

Dormant Commerce Clause

A principle that restricts states from enacting legislation that discriminates against or excessively burdens interstate commerce.

Importation

The act of bringing goods or services into one country from another country in order to sell them.

In-State Growers

Agricultural producers or farmers who operate within a specific state, often in the context of regulatory or marketing preferences.