Calculate detectable effect size for given power

Determines the effect size that can be detected with specified power.

Usage

effect_size_t_test(
  n,
  power = 0.8,
  sd,
  alpha = 0.05,
  alternative = c("two.sided", "less", "greater")
)

Arguments

n

Sample size

power

Desired power (default 0.80)

sd

Standard deviation

alpha

Significance level (default 0.05)

alternative

Alternative hypothesis

Value

Detectable effect size (in original units)

Examples

# Effect size detectable with 80% power and n = 30
effect_size_t_test(n = 30, power = 0.80, sd = 1)
#> [1] 0.5270605