A random sample of 15 emergency reports was selected from the files of an ambulance service. The mean time required for ambulances to reach their destinations was 13.5 minutes with a standard deviation of 6.5 minutes . Assume that the population is normally distributed .

ii. CV = # Step 2. Calculate the margin of error: Show your work using the numerical values in the formula and round the answer to one decimal place. (Use * for multiplication.) E = minutes Step 3. Show a mathematical expression with the numerical values (in one decimal place), without evaluating any part of the expression to find the lower confidence limit: Step 4. Show a mathematical expression with the numerical values (in one decimal place), without evaluating any part of the expression to find the upper confidence limit: Step 5. Write the confidence interval: minutes Select an answer v minutes