Sample size for a test of a Pearson or partial correlation

Computes the sample size required to test a population Pearson or a partial correlation with desired power. Set s = 0 for a Pearson correlation.

For more details, see Section 1.25 of Bonett (2021, Volume 2)

Usage

size.test.cor(alpha, pow, cor, s, h)

Arguments

alpha

alpha level for hypothesis test

pow

desired power

cor

planning value of correlation

s

number of control variables

h

null hypothesis value of correlation

Value

Returns the required sample size

References

Bonett DG (2021). Statistical Methods for Psychologists https://dgbonett.sites.ucsc.edu/.

Examples

size.test.cor(.05, .95, -.50, 0, 0)
#>  Sample size
#>           47

# Should return:
# Sample size
#          47

size.test.cor(.05, .90, .4, 2, 0)
#>  Sample size
#>           64

# Should return:
# Sample size
#          64