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Sample Size or Power Calculation for One-Sample Normal Mean Test

Source: R/one_norm_size.R
one_norm_size.Rd

Calculates sample size or power for a two-sample normal mean test.

Usage

one_norm_size(mu, mu0, sd, alpha, beta = NULL, n = NULL)

Arguments

mu

Numeric. True mean.

mu0

Numeric. Null hypothesis mean.

sd

Numeric. Standard deviation.

alpha

Numeric. Type I error rate.

beta

Numeric (optional). Type II error rate. Required for sample size calculation.

n

Integer (optional). Sample size. Required for power calculation.

Value

Numeric. Returns sample size (if beta is given), or power (if n is given).

Note

Only one of beta (for sample size calculation) or n (for power calculation) should be specified.

Required arguments:

  • For sample size: "mu", "mu0", "sd", "alpha", "beta"

  • For power: "mu", "mu0", "sd", "alpha", "n"

Examples

# Sample size
one_norm_size(mu = 2, mu0 = 1.5, sd = 1,
              alpha = 0.05, beta = 0.2)
#> [1] 32

# Power
one_norm_size(mu = 2, mu0 = 1.5, sd = 1,
              alpha = 0.05, n = 32)
#> [1] 0.8074304