size.test.sign.ps {statpsych}

Sample size for a paired-samples Sign test

Description

Computes sample size required for a Sign test with desired power in a paired-samples design. A planning value of the paired-samples Sign test parameter is required. In a paired-samples experiment, this parameter is the proportion of members in the population with scores that would be larger under treatment 1 than treatment 2. In a paired-samples nonexperiment, this parameter is the proportion of members in the population with measurement 1 scores that are larger than their measurement 2 scores.

Usage

size.test.sign.ps(alpha, pow, p)

Arguments

alpha

alpha level for hypothesis test

pow

desired power

p

planning value of proportion

Value

Returns the required sample size

Examples

size.test.sign.ps(.05, .90, .75)

# Should return:
# Sample size
#          32