Dr. Susan Bonner 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 TB 539 70 99 97 96 97 90 93 94 100 75 84 Click here for the Excel Data File a. What is the point estimate of the population mean? (Round your answer to 2 decimal places.) Estimated poolomon b. Construct a 95% confidence level for the population mean. (Round your answers to 2 decimal places.) c. According to De Benner's test, is it reasonable to conclude that the mean stress level of internet executives is op No MacBook Pro esc > G Search or type URL R % A 1 2 # 3 $ 4 5 6 7 8 9 Q W E R T - MacBook Pro esc > G Search or type URL R % A 1 2 # 3 $ 4 5 6 7 8 9 Q W E R T -