Quiz: Review Quiz for Final Exam inis quiz. 40 point(s) possi This question: 1 point(s) possible Submit quiz In a clinical trial of a certain drug, 24 subjects experience headaches among the 210 subjects treated with the drug. Construct a 90% (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. (Type an integer or a decimal rounded to three decimal places as needed.) b. Identify the value of the margin of error E. (Type an integer or a decimal rounded to three decimal places as needed.) c. Construct the confidence interval.