A third-order autoregressive model is fitted to an arnual time series with 17 values and has the estimated parameters and standard errors shown below. At the 0.05 level of significance, test the appropriateness of the fitted model. aₒ = 4.63 a₁ = 1.45 a₂=0.87 a₃=0.34 Sa₁ = 0.55 Sa₂ = 0.24 Sa₃, = 0.19 2 Click the icon to view the table for the critical values of t. What are the hypotheses for this test? А. H₀ : Аз ≠ 0 B. H₀ : A₂ = 0 H₁ : Аз = 0 H₁: A₂ ≠ 0
C. H₀ : Аз = 0 D. H₀ : A₂ ≠ 0
H₁ : Аз ≠ 0 H₁: A₂ = 0
hat is the test statistic for this test? _______________ (Round to four decimal places as needed.) What are the critical values for this test? _______________ (Round to four decimal places as needed. Use a comma to separate answers as needed.) What is the result of the test of the appropriateness of the fitted model? (1) __________ the null hypothesis. There is (2) ________ evidence to conclude that the third-order regression parameter is significantly different from zero, which means that the third-order autoregressive model (3) ________ appropriate (1) Reject (2) sufficient (3) is Do not reject insufficient is not