POSSIBLE POINTS: 7.14 A car manufacturer crash tests a certain model of car and measures the impact force. The test and model in question produce impact forces that are normally distributed with a mean of 30 metric tons and a standard deviation of 1.5 metric tons. Suppose that the manufacturer tests a random sample of 4 cars and calculates the sample mean impact force What is the probability that the mean impact force from a sample of 4 cars x exceeds 30.75 metric tons? (Make sure to state all information and show all steps). B I y