In a poll with 40% support and a margin of error of +/-4, which range could be the true support?

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Multiple Choice

In a poll with 40% support and a margin of error of +/-4, which range could be the true support?

Explanation:
Margin of error shows how far the true support could be from the poll’s estimate. With 40% and a margin of error of 4 percentage points, the true support could be between 36% and 44%. You get this by adding and subtracting: 40% ± 4% → 36% to 44%. The other ranges don’t fit because they lie outside that 36–44% interval or shrink it beyond what the margin allows.

Margin of error shows how far the true support could be from the poll’s estimate. With 40% and a margin of error of 4 percentage points, the true support could be between 36% and 44%. You get this by adding and subtracting: 40% ± 4% → 36% to 44%. The other ranges don’t fit because they lie outside that 36–44% interval or shrink it beyond what the margin allows.

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