Examples
Examples
Try the starting example
- Sample size
- 100
- Critical z
- 1.96
- Expected proportion
- 0.5
- Margin of error (percentage points)
- 9.8
Try another scenario
- Sample size
- 101
- Critical z
- 1.96
- Expected proportion
- 0.5
- Margin of error (percentage points)
- 9.751364
Calculation method
Calculation method
Margin of error (percentage points)
b × sqrt(c × (1-c) ÷ a) × 100
Symbols and units
- a
- Sample size
- b
- Critical z
- c
- Expected proportion
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Calculation steps and notation
sqrt(x) is the non-negative square root of x.
Assumptions & limits
Assumptions & limits
- Normal approximation for a simple random sample, ignoring population correction and sampling design.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.