You may need to use the appropriate technology to answer this question. In a regression analysis involving 27 observations, the following estimated regression equation was developed. ŷ = 25.2 + 5.5x1 For this estimated regression equation SST = 1,500 and SSE = 550. (a) At a = 0.05, test whether x₁ is significant. State the null and alternative hypotheses. OHP-0 H₁₂O # OHPO HB-0 OH BO Ha Bo=0 OH₁₁ =0 Ha B₁0 Find the value of the test statistic. (Round your answer to two decimal places.) F= Find the p-value. (Round your answer to three decimal places.) p-value= Is x₁ significant? O Reject Ho. We conclude that x₁ is significant. O Do not reject H. We conclude that x, is not significant. Type here to search 3 54°F w W E R F (b) Suppose that variables x and x3 are added to the model and the following regression equation is obtained. = ŷ 16.3 +2.3x, +12.1x,- 5.8x, For this estimated regression equation SST = 1,500 and SSE = 100. Use an F test and a 0.05 level of significance to determine whether x2 and x3 contribute significantly to the model. State the null and alternative hypotheses. O Ho B₂ =B3=0 H: One or more of the parameters is not equal to zero. OH B₁0 #0 HB, O O Ho: One or more of the parameters is not equal to zero. = = H₁₂-B-0 OHP-0 = HBO Find the value of the test statistic. Find the p-value. (Round your answer to three decimal places.) p-value = Is the addition of x2 and X3 significant? O Do not reject Ho. We conclude that the addition of variables x2 and X3 is significant. Reject Ho. We conclude that the addition of variables x, and X3 is not significant. O Reject Ho. We conclude that the addition of variables x2 and x3 is significant. Type here to search W E R S C L③ H N M 54°F
You may need to use the appropriate technology to answer this question. In a regression analysis involving 27 observations, the following estimated regression equation was developed. ŷ = 25.2 + 5.5x1 For this estimated regression equation SST = 1,500 and SSE = 550. (a) At a = 0.05, test whether x₁ is significant. State the null and alternative hypotheses. OHP-0 H₁₂O # OHPO HB-0 OH BO Ha Bo=0 OH₁₁ =0 Ha B₁0 Find the value of the test statistic. (Round your answer to two decimal places.) F= Find the p-value. (Round your answer to three decimal places.) p-value= Is x₁ significant? O Reject Ho. We conclude that x₁ is significant. O Do not reject H. We conclude that x, is not significant. Type here to search 3 54°F w W E R F (b) Suppose that variables x and x3 are added to the model and the following regression equation is obtained. = ŷ 16.3 +2.3x, +12.1x,- 5.8x, For this estimated regression equation SST = 1,500 and SSE = 100. Use an F test and a 0.05 level of significance to determine whether x2 and x3 contribute significantly to the model. State the null and alternative hypotheses. O Ho B₂ =B3=0 H: One or more of the parameters is not equal to zero. OH B₁0 #0 HB, O O Ho: One or more of the parameters is not equal to zero. = = H₁₂-B-0 OHP-0 = HBO Find the value of the test statistic. Find the p-value. (Round your answer to three decimal places.) p-value = Is the addition of x2 and X3 significant? O Do not reject Ho. We conclude that the addition of variables x2 and X3 is significant. Reject Ho. We conclude that the addition of variables x, and X3 is not significant. O Reject Ho. We conclude that the addition of variables x2 and x3 is significant. Type here to search W E R S C L③ H N M 54°F
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter1: Equations And Graphs
Section: Chapter Questions
Problem 10T: Olympic Pole Vault The graph in Figure 7 indicates that in recent years the winning Olympic men’s...
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