bain (version 0.2.2)

t_test: 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.

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.

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.

See Also

t.test

Examples

# NOT RUN {
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
# }