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 curlous about the average salary of a CFA charterholder. He takes a random sample of 49 recent charterholders and computes a mean salary of $159,000 with a standard deviation of $42,000. Use this sample Information to determine the 90% confidence Interval for the average salary of a CFA charterholder. Assume that salaries are normally distributed. (You may find It useful to reference the t table. Round Intermediate calculations to at least 4 decimal places. Round "?" value to 3 decimal places and final answers to the nearest whole number.) Confidence interval to