Question

question 2 of 10
an 80% confidence interval for a proportion is found to be (0.52, 0.56). what is the margin of error?
a. 0.02
b. 0.01
c. 0.04
d. 0.03

Explanation:

Step1: Find interval width

Width = Upper bound - Lower bound = $0.56 - 0.52 = 0.04$

Step2: Calculate margin of error

Margin of error = $\frac{\text{Width}}{2} = \frac{0.04}{2} = 0.02$

Answer:

A. 0.02