If a political poll indicates that a 95% confidence interval for a presidential approval rating is between 47% and 57%, what is the assumed margin of error?

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Mathematics

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4 January, 22:00

If a political poll indicates that a 95% confidence interval for a presidential approval rating is between 47% and 57%, what is the assumed margin of error?

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Koen Salazar · Answer 1

The answer is that the assumed margin of error is 5%.

Here is how we calculate this;

presidential approval rating is between 47% and 57%

(57% - 47%) / 2 = 10/2 = 5%