Question

A 95% confidence interval for the proportion of students achieving a reading achievement score that is above the standard set by the teachers for a population of third grade students is (0.43, 0.49).

The margin of error of this interval is:

Group of answer choices

0.05

0.03

0.06

None of the above

Answer 1

Answer:

0.03

Step-by-step explanation:

First, you subtract the upper bound of the confidence interval by the lower bound of the confidence interval. Then, you divide that number by 2 to get the margin or error.

In this case: (0.49 - 0.43)/2 = 0.03