Uygulamalar Understanding de... Quantitative Methods for Mgmt - STAT-5002-IRA Tests and Quizzes Final Exam Final Exam 60 points possible 18/24 answered Question 19 The Chartered Financial Analyst (CFA) designation is fast becoming a requirement for serious investment professionals. Although it requires a successful completion of three levels of grueling exams, it also entails promising careers with lucrative salaries. A student of finance is curious about the average salary of CFA charterholders in Toronto. He takes a random sample of 21 charterholders and computes a mean salary of $90,941 with a standard deviation of $5,938. Use this sample information to find a 98% confidence interval for the average salary of CFA charterholders in Toronto. Assume that the values are approximately normally distributed. Use t-distribution. Round to the nearest dollar. For part (a) round your answer to 3 decimal places. (a) What is the critical t-value that will need to be used to calculate the confidence interval? For parts (b), (c), round your answer to the nearest dollar. (b) What is the error (c) What is the 98% confidence interval? > Next Question Type here to searchC learn.humber.ca/ultra/courses/_186456_1/cl/outline Uygulamalar Understanding de... Quantitative Methods for Memt - STAT-5002-IRA Tests and Quizzes Final Exam speed to at least 1779 Mbits/sec, a big improvement over 1300 Mbits/sec maximum of the previous version. An independent testing laboratory in Vancouver found that a random sample of 25 of the newest version routers delivered speed of 1708 Mbits/sec, on average, with a standard deviation of 127 Mbits/sec. Is there any evidence that the manufacturer's claim is false? Test the claim using a 2.5% significance level. Assume that the speeds are approximately normally distributed as the histogram of the sample values is roughly symmetric and bell-shaped, so t-distribution is applicable for hypothesis testing. Round to 3 decimal places where appropriate. (a) State the null and alternative hypotheses, and identify which one is the claim. Ho Select an answer ? H1: Select an answer ? Which one is the claim: OH1 O Ho For parts (b), (c) use the correct sign for the t-value and test statistic, either positive or negative. (b) What is the critical t-value? (c) What is the test statistic (from the formula)? (d) is the null hypothesis rejected? O No Yes Type here to search m O