Hypothesis test for a proportion

Source: R/statpsych3.R

Computes a continuity-corrected z-test for a population proportion in a 1-group design. A confidence interval for a population proportion is a recommended supplement to the z-test (see ci.prop).

test.prop(f, n, h)

Arguments

f

number of participants who have the attribute

n

sample size

h

null hypothesis value of proportion

Value

Returns a 1-row matrix. The columns are:

  • Estimate - ML estimate of proportion

  • z - z test statistic

  • p - two-sided p-value

References

Snedecor GW, Cochran WG (1989). Statistical Methods, 8th edition. ISU University Pres, Ames, Iowa.

Examples

test.prop(9, 20, .2)
#>  Estimate        z          p
#>      0.45 2.515576 0.01188379

# Should return:
# Estimate        z          p
#     0.45 2.515576 0.01188379