Exercise 9-41 (Static) (LO9-1, LO9-2) Dr. Susan Benner is an industrial psychologist. She is currently studying stress among executives of Internet companies. She has developed a questionnaire that she believes measures stress. A score above 80 indicates stress at a dangerous level. A random sample of 15 executives revealed the following stress level scores 94 78 83 90 78 99 97 90 97 90 93 94 100 75 84 Click here for the Excel Data File a. Find the point estimate of the population mean. (Round your answer to 2 decimal places.) Estimated population mean b. Construct a 95% confidence level for the population mean. (Round your answers to 2 decimal places.) Confidence interval for the population mean is between and