In order to estimate the population mean EMS response time from notification to arrival at the crash scene in urban areas, a random sample of n = 20 crashes resulted in a sample mean of x with bar on top equals 5.25 minutes. Assume a population standard deviation of sigma equals 2.78 minutes. Use this scenario to answer questions 15 - 18. Question 14 0.01 Points Construct a 95% confidence interval for the population mean EMS response time. (3.649, 6.851) (4.227, 6.273) (3.671, 6.829) (4.032, 6.468)