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Sagot :
Using it's formula, it is found that the confidence interval for the percentage of the population that favors the plan is (39.5%, 44.5%).
What is the formula for a confidence interval?
- A confidence interval is given by the sample percentage plus/minus the margin of error.
In this problem:
- The sample percentage is of 42%.
- The margin of error is of 2.5%.
42 - 2.5 = 39.5%
42 + 2.5 = 44.5%
Hence, the confidence interval for the percentage of the population that favors the plan is (39.5%, 44.5%).
You can learn more about a confidence interval at https://brainly.com/question/25779324
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