The Weather Underground reported that the mean amount of summer rainfall for the northeastern US is at least 11.52 inches. Ten cities in the northeast are randomly selected and the mean rainfall amount is calculated to be 7.42 inches with a standard deviation of 1.3 inches. At the = 0.05 level, can it be concluded that the mean rainfall was below the reported average? What if = 0.01? Assume the amount of summer rainfall follows a normal distribution (Use Critical Approach) 20 marks 2. The response times for a random sample of 50 medical emergencies were tabulated. The sample mean is 13.25 minutes. The population standard deviation is believed to be 4.2 minutes. The EMS director wants to perform a hypothesis test, with a .05 level of significance, to determine whether the service goal of 12 minutes or less is being achieved. Find the following: a. Use both P-value & Critical Approach 30 marks b. Find the interval estimation at 90%. 10 marks 3. Driver error can be listed as the cause of approximately 45% of all fatal auto accidents, according to the American Automobile Association. Thirty randomly selected fatal accidents are examined, and it is determined