Sample Size Calculator (original) (raw)

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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