t_test {bain}R Documentation

Student's t-test

Description

This function is a wrapper for the function t.test, which returns group-specific sample sizes and variances, in addition to the usual output of t.test.

Usage

t_test(x, ...)

Arguments

x

An object for which an S3 method of t.test exists (vector or formula).

...

arguments passed to t.test.

Details

This wrapper allows users to enjoy the functionality of bain with the familiar interface of the stats-function t.test.

For more documentation, see t.test.

Value

A list with class "t_test" containing the following components:

statistic

the value of the t-statistic.

parameter

the degrees of freedom for the t-statistic.

p.value

the p-value for the test.

conf.int

a confidence interval for the mean appropriate to the specified alternative hypothesis.

estimate

the estimated mean or difference in means depending on whether it was a one-sample test or a two-sample test.

null.value

the specified hypothesized value of the mean or mean difference depending on whether it was a one-sample test or a two-sample test.

alternative

a character string describing the alternative hypothesis.

method

a character string indicating what type of t-test was performed.

data.name

a character string giving the name(s) of the data.

v

The variance or group-specific variances.

n

The sample size, or group-specific sample size.

See Also

t.test

Examples

tmp <- t_test(extra ~ group, data = sleep)
tmp$n
tmp$v
tmp2 <- t_test(extra ~ group, data = sleep)
tmp2$n
tmp2$v
tmp <- t_test(extra ~ group, data = sleep, paired = TRUE)
tmp$n
tmp$v
tmp2 <- t_test(extra ~ group, data = sleep, paired = TRUE)
tmp2$n
tmp2$v
t_test(sesamesim$postnumb)
tmp <- t_test(sesamesim$prenumb)
tmp$n
tmp$v
tmp2 <- t_test(sesamesim$prenumb)
tmp2$n
tmp2$v
tmp <- t_test(sesamesim$prenumb, sesamesim$postnumb)
tmp$n
tmp$v
tmp2 <- t_test(sesamesim$prenumb, sesamesim$postnumb)
tmp2$n
tmp2$v
tmp <- t_test(sesamesim$prenumb, sesamesim$postnumb, paired = TRUE)
tmp$n
tmp$v
tmp2 <- t_test(sesamesim$prenumb, sesamesim$postnumb, paired = TRUE)
tmp2$n
tmp2$v

[Package bain version 0.2.4 Index]