An insurance company checks police records on 582 accidents selected at random and notes that teenagers were at the wheel in 91 of them. 1. What is the formula for a confidence interval for a population proportion? 2. Calculate a 95 % confidence interval for the proportion of accidents with teenage drivers at the wheel. 3. What is the margin of error? 4. Explain what the 95 % confidence intervals tells us in the context of all accidents. 5. A politician urging tighter restrictions on drivers' licenses issued to teens says, "In one of every five auto accidents, a teenager is behind the wheel." Does your confidence interval support or contradict this statement? Explain.