There are 300 students enrolled in Business Statistics. Historically, scores are normally distributed with a standard deviation of 24.5. Your instructor randomly selected a sample of 30 examinations and finds a mean of 77.3. Determine a 90% confidence interval for the mean score for all students taking the course. (Round your answer(s) to 3 decimal places.)

Answer rating: 100% (QA)

Solution Obtain the 90 confidence interval for the mean score for all the studen... View the full answer