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In a clinical trial of a certain​ drug, 14 subjects experience headaches among the 221 subjects...

In a clinical trial of a certain​ drug, 14 subjects experience headaches among the 221 subjects treated with the drug. Construct a 99​% ​(Wald) confidence interval estimate for the proportion of treated subjects who experience​ headaches, completing parts​ (a) through​ (d) below.

a. Find the best point estimate of the population proportion. 0.063 ​(Type an integer or a decimal rounded to three decimal places as​ needed.)

b. Identify the value of the margin of error E. nothing ​(Type an integer or a decimal rounded to three decimal places as​ needed.)

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