Question

A confidence interval for a difference in proportions is −0.077 to 0.013. What are the point estimate and the margin of error for this interval?

Answer 1

Answer: Point estimate: -0.032

Margin of Error: 0.045

Explanation: Point estimate: (-0.077/0.013)/2 = -0.032

Margin of Error: 0.013+-0.032=0.45 or -0.77--0.032= -0.045