Examples
Examples
Try the starting example
- Fixed item repeat groups JSON [[readings in one measurement unit],...]
- [[9,10,11],[19,20,21]]
- Pooled repeatability standard deviation (measurement units)
- 1
- Residual degrees of freedom
- 4
- Item means (measurement units)
- [10,20]
Try another scenario
- Fixed item repeat groups JSON [[readings in one measurement unit],...]
- [[8,10,12],[18,20,22]]
- Pooled repeatability standard deviation (measurement units)
- 2
- Residual degrees of freedom
- 4
- Item means (measurement units)
- [10,20]
Calculation method
Calculation method
Pooled repeatability standard deviation (measurement units)
sqrt(sum_i sum_j (xij-mean_i)^2 / sum_i(ni-1)).
Residual degrees of freedom
sum_i(ni-1).
Item means (measurement units)
Mean within each fixed-item group.
Symbols and units
- a
- Fixed item repeat groups JSON [[readings in one measurement unit],...]
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
- Same instrument/operator repeatability for stable fixed items. Pooling presumes common within-item variance; excludes operator reproducibility and part variance. Supported limits: 1..100 groups; each 2..100 replicates; finite numbers.
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.