pwr_paired_t_test: Power and sample size for paired t-test for two population.

In gilberto-sassi/power:

Description

pwr_paired_t_test computes the power and the sample size for testing difference of means of two associates and normal populations .

Usage

pwr_paired_t_test(
  sigma_d,
  delta,
  delta0 = 0,
  n = NULL,
  pwr = NULL,
  alternative = "two.sided",
  sig_level = 0.05
)

Arguments

sigma_d	standard deviation of difference of each pair
delta	difference of means
delta0	difference of means under null hypothesis
n	number of pairs
pwr	power of test 1 + β (1 minus type II error probability)
alternative	a character string specifying the alternative hypothesis, must be one of "two.sided" (default), "greater" or "less"
sig_level	significance level (Type I error probability)

Value

pwr_paired_t_test returns a list with the following components:

sigma_d

standard deviation of difference of each pair

delta

difference of means

delta0

dfference of means under null hypothesis

sig_level

significance level

power_sampleSize

A tibble with sample size and n is the number of pairs

Examples

# Power
pwr_paired_t_test(sigma_d = 5, delta = 5, delta0 = 0,
n1 = 10, n2 = 10, pwr = NULL, alternative = "two.sided", sig_level = 0.05)
# Sample size
pwr_paired_t_test(sigma_d = 5, delta = 5, delta0 = 0,
n1 = NULL, n2 = NULL, pwr = 0.99, alternative = "two.sided",
sig_level = 0.05)

gilberto-sassi/power documentation built on July 17, 2020, 1:02 p.m.