see.power {asbio}R Documentation

Interactive depiction of type I and type II error and power

Description

Provides an interactive pedagogical display of power.

Usage


see.power(alpha = NULL, sigma = NULL, n = NULL, effect = NULL,
test = "lower", xlim = c(-3, 3), strict = FALSE)

see.power.tck()

Arguments

alpha

Type I error.

sigma

Standard deviation of underlying population.

n

sample size

effect

Effect size

test

Type of test, one of c("lower","upper","two").

xlim

X-axis limits

strict

Causes the function to use a strict interpretation of power in a two-sided test. If strict = TRUE then power for a two sided test will include the probability of rejection in the opposite tail of the true effect. If strict = FALSE (the default) power will be half the value of α if the true effect size is zero.

Details

The function see.power provides an interactive display of power. The function see.power.tck provides a tcltk GUI to manipulate see.power

Author(s)

Ken Aho


[Package asbio version 1.7 Index]