1-20chapter stats

Consider the following partial computer output for a

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 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 What is the explained variation? 1053.09 SS Regression = explained variation = 1053.09 AACSB: Analytic Bloom's: Application Difficulty: Easy Learning Objective: 4 Topic: Multiple regression model 1-1434 Chapter 01 - An Introduction to Business Statistics 112. 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 What is the mean square error? 58.08 MSE = 1858.50/32 AACSB: Analytic Bloom's: Application Difficulty: Easy Learning Objective: 2 Topic: Multiple regression model 1-1435 Chapter 01 - An Introduction to Business Statistics 113. 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 Calculate R2. 0.3617 R2 = 1053.09/2911.59 = 0.3617 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 3 Topic: Coefficient of determination 1-1436 Chapter 01 - An Introduction to Business Statistics 114. 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 Test the overall usefulness of the model at α = .01. Calculate F and make your decision. F = 6.04, reject H0 MSR = 1053.09/3 = 351.03 MSE = 1858.50/32 = 58.08 F = MSR/MSE = 351.03/58.08 = 6.04 F.01,3,32 = 4.51 6.04 > 4.51, reject H0 AACSB: Analytic Bloom's: Application Difficulty: Hard Learning Objective: 4 Topic: Overall F test 1-1437 Chapter 01 - An Introduction to Business Statistics 115. 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 What is the number of observations in the sample? n = 3 + 32 + 1 = 36 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 1 Topic: Multiple regression model 1-1438 Chapter 01 - An Introduction to Business Statistics 116. 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 Calculate the adjusted R2. 0.3019 R2 = 1053.09/2911.59 = 0.3617 R2 adjusted = (0.3617 - (3/35)(35/32) = (0.3617 - 0.0857)(1.0938) = 0.3019 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 3 Topic: Coefficient of determination 1-1439 Chapter 01 - An Introduction to Business Statistics 117. A member of the state legis...
View Full Document

Ask a homework question - tutors are online