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62090 analysis of variance calculate r2 1 1355

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Unformatted text preview: eshmen across the state. She asks her research assistant to conduct a study to investigate what factors could account for the differences. The research assistant looked at a random sample of school districts across the state and used the factors of percentage of mathematics teachers in each district with a degree in mathematics, the average age of mathematics teachers and the average salary of mathematics teachers s = 7.62090 Analysis of Variance Determine the 90% interval for β2 and interpret its meaning 1-1361 Chapter 01 - An Introduction to Business Statistics 120. A member of the state legislature has expressed concern about the differences in the mathematics test scores of high school freshmen across the state. She asks her research assistant to conduct a study to investigate what factors could account for the differences. The research assistant looked at a random sample of school districts across the state and used the factors of percentage of mathematics teachers in each district with a degree in mathematics, the average age of mathematics teachers and the average salary of mathematics teachers s = 7.62090 Analysis of Variance Based on the multiple regression model given above, estimate the mathematics test score and calculate the value of the residual, if the percentage of teachers with a mathematics degree is 50.0, the average age is 43 and the average salary is 48,300 (48.3). The actual mathematics test score for these factors is 68.50. 1-1362 Chapter 01 - An Introduction to Business Statistics 121. A member of the state legislature has expressed concern about the differences in the mathematics test scores of high school freshmen across the state. She asks her research assistant to conduct a study to investigate what factors could account for the differences. The research assistant looked at a random sample of school districts across the state and used the factors of percentage of mathematics teachers in each district with a degree in mathematics, the average age of mathematics teachers and the average salary of mathematics teachers s = 7.62090 Analysis of Variance Additional information related to this point estimate of 65.12 is given below. Predicted Values for New Observations 50% with math degree, average age of 43 and average salary is 48.3 New Determine the 95% confidence interval for this estimate and interpret its meaning. 1-1363 Chapter 01 - An Introduction to Business Statistics 122. A member of the state legislature has expressed concern about the differences in the mathematics test scores of high school freshmen across the state. She asks her research assistant to conduct a study to investigate what factors could account for the differences. The research assistant looked at a random sample of school districts across the state and used the factors of percentage of mathematics teachers in each district with a degree in mathematics, the average age of mathematics teachers and the average salary of mathematics teachers s = 7.62090 Analysis of Variance Additional information related to this point estimate of 65.12 is given below. Predicted Values for New Observations 50% with math degree, average age of 43 and average salary is 48.3 New Calculate the 95% prediction interval for this point estimate. Chapter 14 Multiple Regression Answer Key 1-1364 Chapter 01 - An Introduction to Business Statistics True / False Questions 1. Regression models that employ more than one independent variable are referred to as multiple regression models. TRUE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 1 Topic: Multiple regression model 2. The error term in the regression model describes the effects of all factors other than the independent variables on y (response variable). TRUE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 1 Topic: Multiple regression model 3. In a regression model, at any given combination of values of the independent variables, the population of potential error terms is assumed to have an F-distribution. FALSE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 2 Topic: Multiple regression model 4. In a regression model, a value of the error term depends upon other values of the error term. FALSE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 2 Topic: Multiple regression model 1-1365 Chapter 01 - An Introduction to Business Statistics 5. A t-test is used in testing the significance of an individual independent variable. TRUE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 5 Topic: Significance of an independent variable 6. Due to the fact that multiple regression models consist of multiple independent variables, residual analysis cannot be performed. FALSE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Easy Learning Objective: 9 Topic: Residual analysis 7. When the F test is used to test the overall significance of a multiple regression model, if the null hypothesis is rejected, it can be concluded that a...
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