t.test2: t test 2

In debarros/rrttReportBuilder: Report Builder for Rapid Return To Teacher

Description

Perform a t test using summary stats rather than source data

Usage

## S3 method for class 'test2'
t(m1, m2, s1, s2, n1, n2, m0 = 0, equal.variance = FALSE,
  messageLevel = 0)

Arguments

m1	mean of sample 1
m2	mean of sample 2
s1	the sample standard deviation of sample 1
s2	the sample standard deviation of sample 2
n1	the size of sample 1
n2	the size of sample 2
m0	the null value for the difference in means to be tested for. Default is 0.
equal.variance	whether or not to assume equal variance. Default is FALSE.
messageLevel	integer of length 1 indicating the level of diagnostic messages to generate

Value

list of length 4 with elements "Difference of means", "Std Error", "t", and "p-value"

Note

This is based on code written by CrossValidated user Macro. The original can be found at https://stats.stackexchange.com/a/30450

Examples

x1 = rnorm(100)
x2 = rnorm(200)
# you'll find this output agrees with that of t.test when you input x1,x2
t.test2( mean(x1), mean(x2), sd(x1), sd(x2), 100, 200)
t.test(x1, x2)

debarros/rrttReportBuilder documentation built on Oct. 16, 2020, 4 p.m.