sample_size_comp {radiant.design}

Sample size calculation for comparisons

Description

Sample size calculation for comparisons

Usage

sample_size_comp(
  type,
  n1 = NULL,
  n2 = NULL,
  p1 = NULL,
  p2 = NULL,
  delta = NULL,
  sd = NULL,
  conf_lev = NULL,
  power = NULL,
  ratio = 1,
  alternative = "two.sided"
)

Arguments

type

Choose "mean" or "proportion"

n1

Sample size for group 1

n2

Sample size for group 2

p1

Proportion 1 (only used when "proportion" is selected)

p2

Proportion 2 (only used when "proportion" is selected)

delta

Difference in means between two groups (only used when "mean" is selected)

sd

Standard deviation (only used when "mean" is selected)

conf_lev

Confidence level

power

Power

ratio

Sampling ratio (n1 / n2)

alternative

Two or one sided test

Details

See https://radiant-rstats.github.io/docs/design/sample_size_comp.html for an example in Radiant

Value

A list of variables defined in sample_size_comp as an object of class sample_size_comp

See Also

summary.sample_size_comp to summarize results

Examples

sample_size_comp(
  type = "proportion", p1 = 0.1, p2 = 0.15,
  conf_lev = 0.95, power = 0.8
)