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Hypothesis test for a Pearson or partial correlation

Source: R/statpsych2.R
test.cor.Rd

Computes a t test for a test of the null hypothesis that a population Pearson or partial correlations is equal to 0, or a z test using a Fisher transformation for a test of the null hypothesis that a Pearson or partial correlation is equal to some specified nonzero value. Set s = 0 for a Pearson correlation. The hypothesis testing results should be accompanied with a confidence interval for the population Pearson or partial correlation value (see ci.cor).

Usage

test.cor(cor, n, s, h)

Arguments

cor

estimated correlation

n

sample size

s

number of control variables

h

null hypothesis value of correlation

Value

Returns a 1-row matrix. The columns are:

  • Estimate - estimate of correlation

  • t or z - t test statistic (for h = 0) or z test statistic (for nonzero h)

  • p - two-sided p-value

Examples

test.cor(.484, 100, 0, .2)
#>  Estimate        z           p
#>     0.484 3.205432 0.001348601

# Should return:
# Estimate        z           p
#    0.484 3.205432 0.001348601


test.cor(.372, 100, 0, 0)
#>  Estimate        t df           p
#>     0.372 3.967337 98 0.000138436

# Should return:
#  Estimate        t df           p
#     0.372 3.967337 98 0.000138436