The margin of error of a confidence interval will increase i

The margin of error of a confidence interval will increase if the confidence level is increased from 95% to 99%?

A)True or B)False

Solution

TRUE.

As you increase the confidence level, z(alpha/2) increases.

As E = z(alpha/2) * sigma / sqrt(n)

As z(alpha/2) increases, then E (margin of error) must also increase.

Thus, TRUE. [ANSWER]