Examples
Examples
Try the starting example
- Group A successes
- 60
- Group A trials
- 100
- Group B successes
- 45
- Group B trials
- 100
- Difference in sample proportions
- 0.15
- Pooled z statistic
- 2.123977
- Two-sided p value
- 0.033672
Try another scenario
- Group A successes
- 61
- Group A trials
- 100
- Group B successes
- 45
- Group B trials
- 100
- Difference in sample proportions
- 0.16
- Pooled z statistic
- 2.266826
- Two-sided p value
- 0.023401
Calculation method
Calculation method
Difference in sample proportions
Pooled null SE=sqrt(pooled(1-pooled)(1/nA+1/nB)); no continuity correction.
Pooled z statistic
Pooled null SE=sqrt(pooled(1-pooled)(1/nA+1/nB)); no continuity correction.
Two-sided p value
Pooled null SE=sqrt(pooled(1-pooled)(1/nA+1/nB)); no continuity correction.
Symbols and units
- a
- Group A successes
- b
- Group A trials
- c
- Group B successes
- d
- Group B trials
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Independent Bernoulli trials, large-sample approximation. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Independent Bernoulli trials, large-sample approximation.
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.