Part 1 of 2 (a) An article in a medical journal suggested that approximately 5% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.05? A sample of 182 operations is needed to obtain a 99.8% confidence interval with a margin of error of 0.05 using the estimate 0.05 for p. X Part: 1/2 Part 2 of 2 (b) Estimate the sample size needed if no estimate of p is available. A sample of operations is needed to obtain a 99.8% confidence interval with a margin of error of 0.05 when no X estimate of p is available.