Question: For a set of data based on a sample size of 18, the coefficients of determination (R) for linear, quadratic, cubic, and quartic polynomials are

For a set of data based on a sample size of 18, the coefficients of determination (R) for linear, quadratic, cubic, and quartic polynomials are 0.47, 0.58, 0.61, and 0.74, respectively. Perform an ANOVA. At a 5% level of significance, which model would be recommended?

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