Surgical complications: A medical researcher wants to construct a  99%  confidence interval for the proportion of knee replacement surgeries that result in complications.   Part: 0 / 2 0 of 2 Parts Complete   Part 1 of 2     (a) An article in a medical journal suggested that approximately  13%  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  0.07 ? A sample of     operations is needed to obtain a  99%  confidence interval with a margin of error of  0.07  using the estimate  0.13  for  p .

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