tmtest: Independent two means test similar to t.test with summarized...

In sasLM: 'SAS' Linear Model

Independent two means test similar to t.test with summarized input

Description

This produces essentially the same to t.test except using summarized input (sufficient statistics).

Usage

  tmtest(m1, s1, n1, m0, s0, n0, conf.level=0.95, nullHypo=0, var.equal=F)

Arguments

m1	mean of the first (test, active, experimental) group
s1	sample standard deviation of the first group
n1	sample size of the first group
m0	mean of the second (reference, control, placebo) group
s0	sample standard deviation of the second group
n0	sample size of the second group
conf.level	confidence level
nullHypo	value for the difference of means under null hypothesis
var.equal	assumption on the variance equality

Details

The default is Welch t-test with Satterthwaite approximation.

Value

The output format is very similar to t.test

Author(s)

Kyun-Seop Bae [e-mail]

See Also

mtest, TTEST, ztest

Examples

  tmtest(5.4, 10.5, 3529, 5.1, 8.9, 5190) # NEJM 388;15 p1386
  tmtest(5.4, 10.5, 3529, 5.1, 8.9, 5190, var.equal=TRUE)

sasLM documentation built on Nov. 19, 2023, 5:12 p.m.