designSaviT3bWantParameter: Helper function to designing a savi T-test (output deltaMin...

In safestats: Safe Anytime-Valid Inference

Helper function to designing a savi T-test (output deltaMin based on the shortest interval at nPlan)

Description

Finds the parameter and deltaMin when provided with only alpha and nPlan

Usage

designSaviT3bWantParameter(
  nPlan,
  alpha = 0.05,
  alternative = c("twoSided", "greater", "less"),
  testType = c("oneSample", "paired", "twoSample"),
  parameter = NULL,
  eType = c("mom", "eGauss", "imom", "eCauchy", "grow", "lai"),
  ...
)

Arguments

nPlan	optional numeric vector of length at most 2, see scenario 2 and 3 above.
alpha	numeric in (0, 1) that specifies the tolerable type I error and the null rejection rule e >= 1/alpha.
alternative	a character string specifying the alternative hypothesis. Must be one of "twoSided" (default), "greater" or "less".
testType	either one of "oneSample", "paired", "twoSample".
parameter	numeric, an optional savi test defining parameter. Default set to NULL. and adapts to meanDiffMin and eType, see matchEParameterWith for details.
eType	character one of "mom", "grow", "eGauss", and "eCauchy". "mom" is default and uses a non-local moment prior with bump(s) at meanDiffMin, "grow" uses point prior(s) at meanDiffMin, "eGauss" a zero-centred normal prior, "eCauchy" a zero centred Cauchy prior.
...	further arguments to be passed to or from methods, but mainly to perform do.calls.

Value

A list with the parameter and the parameter amongst other items

References

Grünwald, P. D., de Heide, R., & Koolen, W. (2024). Safe testing. Journal of the Royal Statistical Society. Series B (Methodological), 86(5), 1091-1128. (With discussions), https://doi.org/10.1093/jrsssb/qkae011. Ly, A, Boehm, Grünwald, P. D., Ramdas, A., & van Ravenzwaaij, D. (2024). Safe Anytime-Valid Inference: Practical maximally flexible sampling designs for experiments based on e-values. PsyArXiv Preprint, https://doi.org/10.31234/osf.io/h5vae.

Examples

designSaviT3bWantParameter(nPlan=20)

safestats documentation built on Sept. 6, 2026, 1:06 a.m.