## Inferences and Linear

Student ID: 21317632 Exam: 250714RR -INFERENCES AND LINEAR REGRESSION When you have completed your exam and reviewed your answers, click Submit Exam. Answers will not be recorded until you hit Submit Exam. If you need to exit before completing the exam, click Cancel Exam. Questions 1 to 20: Select the best answer to each question. Note that a question and its answers may be split across a page break, so be sure that you have seen the entire question and all the answers before choosing an answer. 1. Given the significance level 0.025, the F-value for the degrees of freedom, df = (7,3) is A.

Student ID: 21317632 Exam: 250714RR -INFERENCES AND LINEAR REGRESSION When you have completed your exam and reviewed your answers, click Submit Exam. Answers will not be recorded until you hit Submit Exam. If you need to exit before completing the exam, click Cancel Exam. Questions 1 to 20: Select the best answer to each question. Note that a question and its answers may be split across a page break, so be sure that you have seen the entire question and all the answers before choosing an answer. 1. Given the significance level 0.025, the F-value for the degrees of freedom, df = (7,3) is A. 14.62. B. 5.89. C. 8.45. D. 27.67. 2. A regression analysis between sales (in $1000) and advertising (in $) resulted in the following least squares line: yË = 80,000 + 5x. This implies that an increase of _______ in advertising is expected to result in an increase of _______ in sales. A. $1, $5 B. $5, $5,000 C. $1, $80,005 D. $1, $5,000 3. An indication of no linear relationship between two variables would be a coefficient of A. correlation equal to -1. B. determination equal to -1. C. correlation of 0. D. determination equal to 1. 4. In testing a population variance or constructing a confidence interval for the population variance, an essential assumption is that A. the population is normally distributed. B. expected frequencies equal or exceed 5. C. sample size exceeds 30. D. the population is uniformly distributed. 5. The object on which the response and factors are observed is called A. treatments. B. factors. C. experimental unit. D. factor level.

6. A chi-square test for independence with 8 degrees of freedom results in a test statistic of 18.21. Using the chi-square table, the most accurate statement that can be made about the p-value for this test is that A. 0.025 > p-value > 0.01. B. 0.10 > p-value > 0.05. C. p-value p-value > 0.025. 7. A balanced experiment requires that A. at least two treatment groups be used. B. at least one sample equal size is…