1.Harris Interactive conducted a poll of American adults in August of 2011 to study the use of online medical information. Of the 1,019 randomly chosen adults, 60% had used the Internet within the past month to obtain medical information.

a.Calculate the standard error of the sample proportion, SE(

b.Find the margin of error for a 99% confidence interval by using the correct multiplier Z* and the SE you found in the previous problem.

c.Write the confidence interval for the proportion in the population of American adults based on the sample proportion found by Harris Interactive.First write it in the form margin of error and then as an interval.