The article “Nine Out of Ten Drivers Admit in Survey to Having Done Something Dangerous” (Knight Ridder Newspapers, July 8, 2005) reported on a survey of 1,100 drivers. Of those surveyed, 990 admitted to careless or aggressive driving during the previous 6 months. Assume that this sample of 1,100 is representative of the population of drivers.
a. Use the given information to estimate the proportion of drivers who had engaged in careless or aggressive driving in the previous 6 months.
b. Verify that the conditions needed in order for the margin of error formula to be appropriate are met.
c. Compute the margin of error.
d. Interpret the margin of error in the context of this problem.