lr.rd: Likelihood ratio statistics for one-sided tests of risk...

lr.rdR Documentation

Likelihood ratio statistics for one-sided tests of risk difference.

Description

Calculates all possible values of the (signed) LR statistic for testing p1-p0 greater than a provided null value psi.

Usage

lr.rd(
  n0,
  n1,
  Y0 = NULL,
  Y1 = NULL,
  psi = 0,
  sided = 1,
  mod = 1e-07,
  dec.places = 10
)

Arguments

n0

control sample size

n1

treatment sample size

Y0

number of successes for control (see details)

Y1

number of successes for treatment (see details)

psi

null value of risk difference p1-p0

sided

(1 or 2 sided test) #' @param sided 1-sided or 2-sided test

mod

A very small adjustment to account for 0*log0 in certain likelihood calculations. Should not need adjustment.

dec.places

number of decimal places of t-values and p-value.

Details

If Y0,Y1 is not supplied then all possible values are output. If specific values for Y0, Y1 are supplied then only these outcomes of the SRLR are calculated.

Value

A list with elements

y0,y1

data sets (scalar or vector)

T, P

quasi-exact P-value(s) and equivalent T-value(s)

pmle

profile ML estimates of baseline probability

index

consistent code to select a single outcome

psi

scalar null value of p1-p0

Author(s)

Chris J. Lloyd

References

C.J. Lloyd (2022) Exact samples sizes for clinical trials subject to size and power constraints. Preprint. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.13140/RG.2.2.11828.94085")}


exact.n documentation built on Nov. 9, 2023, 9:06 a.m.