Question

50 POINT QUESTION

A 90% confidence interval for a proportion is found to be (0.60, 0.68). What is the margin of error?

Answer 1

Remember to use PEMDAS order of operation when working out this problem.

(0.60+0.68)/2

(0.60+0.68)=1.28

1.28/2=0.64

0.64-0.68=0.04

0.04*100%=4%

Explanation:

Answer 2

0.04 or 4%

Explanation:

point estimate of proportion:

(0.6+0.68)/2

1.28/2

0.64

Margin of error:

0.68 - 0.64 = 0.04

0.04×100 = 4%