Problem
Question 9 of 25 A $90 \%$ confidence interval for a proportion is found to be $(0.52,0.58)$. What is the sample proportion? A. 0.54 B. 0.55 C. 0.56 D. 0.58
Solution
Step 1 ：Find the midpoint of the confidence interval: \(\frac{0.52 + 0.58}{2}\)
Step 2 ：Calculate the midpoint: \(\frac{1.1}{2} = 0.55\)
Step 3 ：The sample proportion is: \(\boxed{0.55}\)
