ifr_ts_prop_test: Two Sample Test of Proportion

In inferr: Inferential Statistics

Two Sample Test of Proportion

Description

Tests on the equality of proportions using large-sample statistics. It tests that a sample has the same proportion within two independent groups or two samples have the same proportion.

Usage

ifr_ts_prop_test(
  data,
  var1,
  var2,
  alternative = c("both", "less", "greater", "all"),
  ...
)

ifr_ts_prop_group(
  data,
  var,
  group,
  alternative = c("both", "less", "greater", "all")
)

ifr_ts_prop_calc(
  n1,
  n2,
  p1,
  p2,
  alternative = c("both", "less", "greater", "all"),
  ...
)

Arguments

data	a data.frame or tibble
var1	factor; column in data
var2	factor; column in data
alternative	a character string specifying the alternative hypothesis, must be one of "both" (default), "greater", "less" or "all". You can specify just the initial letter
...	additional arguments passed to or from other methods
var	factor; column in data
group	factor; column in data
n1	sample 1 size
n2	sample 2 size
p1	sample 1 proportion
p2	sample 2 proportion

Value

an object of class "ifr_ts_prop_test". An object of class "ifr_ts_prop_test" is a list containing the following components:

n1	sample 1 size
n2	sample 2 size
phat1	sample 1 proportion
phat2	sample 2 proportion
z	z statistic
sig	p-value for z statistic
alt	alternative hypothesis

Deprecated Functions

infer_ts_prop_test(), infer_ts_prop_grp() and infer_ts_prop_calc() have been deprecated. Instead use ifr_ts_prop_test(), ifr_ts_prop_group() and ifr_ts_prop_calc().

References

Sheskin, D. J. 2007. Handbook of Parametric and Nonparametric Statistical Procedures, 4th edition. : Chapman & Hall/CRC.

See Also

prop.test

Examples

# using variables
# lower tail
ifr_ts_prop_test(treatment, treatment1, treatment2,
alternative = 'less')

# using groups
# lower tail
ifr_ts_prop_group(treatment2, outcome, female,
alternative = 'less')

# using sample size and proportions
# lower tail
ifr_ts_prop_calc(n1 = 30, n2 = 25, p1 = 0.3, p2 = 0.5, alternative = 'less')

inferr documentation built on April 4, 2025, 2:08 a.m.