Cite a Der Article Com to Cite her Article in PareOnLine net areOnLine sala@gm gle.com email that's efficient, plicable My Life s.com My Life A In 1990 the National Research Council reported that 70% of the observed traffic was in technical violation of the posted 55 mph speed limit. (Special Report, November 1995, p. 13.) Suppose this estimate was based on a random sample of 487 vehicles Given n (a) What is the margin of error with 95% confidence? Hint: The margin of error is the plus/minus piece of the confidence interval formula. The formula is on page 125 (21st ed) Don't make this harder than it is, it is the step you have to do before finding the confidence interval (0) Construct a 95% confidence interval for the true percentage of speeders. Suppose instead the sample size had been 506. (cfind the margin of error with 95% confidence? (0) Construct a 95% confidence interval for the true percentage of speeders.( Suppose instead the sample size had been 714 (e) Find the margin of error with 95% confidence? (f) Construct a 95% confidence interval for the true percentage of speeders ( (9) As the sample increases, the margin of error O increases decreases. (h) As the sample increases, the width of the confidence interval increases n decreases