Question

A 90% confidence interval for the mean height of students

is (60.128, 69.397). What is the value of the margin of error?

Answer 1

4.635

Explanation:

A confidence interval is:

CI = μ ± ME

where μ is the sample mean and ME is the margin of error.

In other words, the margin of error is half the width of the interval.

ME = (69.397 − 60.128) / 2

ME = 4.635