Renaissance Research & Consulting
ONLINE RESEARCH TOOLS


SAMPLE SIZE CALCULATORS


SINGLE SAMPLE

I want a % precision around 50% at the 95% 90% 85% 80% confidence level.


You will need at least respondents.

TWO EQUAL SAMPLES

I want to detect a % difference between two samples of equal size around 50% at the 95% 90% 85% 80% confidence level.


Each sample must contain at least respondents.

SAMPLING POWER CALCULATOR


TWO SAMPLES

The size of the first sample is.

The size of the second sample is.

How small a difference between the samples around 50% can I detect at the 95% 90% 85% 80% confidence level?.


You can detect a difference of at least %.

Note: 50% is the hardest test. With these samples, you can detect smaller differences around other percentages.

Other Services Offered

Home