American Research Group, Inc.


Sample Size Calculator

Enter a population size to determine the sample sizes required to achieve various theoretical margins of error, plus or minus, 95% of the time, for questions where opinion is evenly split.

Population size.................


 
Plus or minus:      
1 percentage point...........

6 percentage points..........

2 percentage points.........

7 percentage points..........

3 percentage points.........

8 percentage points..........

4 percentage points.........

9 percentage points..........

5 percentage points.........

10 percentage points........

Other calculators:

Margin of Error Calculator, Ballot Lead Calculator

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