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BUSI1013_Final Exam 1 FINAL EXAM Marissa Leblanc June 24, 2018 BUSI 1013 / Statistics for Business Albert Wong
BUSI1013_Final Exam 2 Question 1 (8 points) A computer manufacturer has developed a regression model relating Sales (Y in \$10,000) with two independent variables. The two independent variables are Price (in dollars) and Advertising (in \$1000). Part of the regression results are shown below. ANOVA df SS MS Regression 2 27641631 13820816 Residual 35 42277876 1207939. 3 Coefficient s Standard Error t Stat Intercept 2268.233 1237.880 Price -0.803 0.316 Advertising 0.216 0.079 1. What has been the sample size? (2 points) 2. What is the value of the F test statistic for testing whether the regression model is significant? (2 points) 3. What is the rejection rule for testing whether the regression model is significant at the 0.5 level of significance? (2 points) 4. What is the value of the t test statistic for testing whether the variable Price is significant? (2 points)
BUSI1013_Final Exam 3 Question 2 (8 points) Salary information regarding male and female employees of a large company is shown below. Male Female Sample Size 64 36 Sample Mean Salary (in 1,000) 44 41 Sample Standard Deviation 128 72 1. What is the set of null and alternative hypotheses if we want to determine whether the mean salary of male and female employees is the same? (2 points) 2. Using a level of significance of 0.05, what is the rejection rule for this test using the critical value approach if the degrees of freedom (df) for this test is given to be df = 97? (2 points) 3. Calculate the t statistic. (2 points)
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