t.test {stats} R Documentation

Student's t-Test

Description


Performs one and two sample t-tests on vectors of data.

Usage

t.test(x,
    y = NULL,
    alternative = TwoSided,
    mu = 0,
    paired = FALSE,
    var.equal = FALSE,
    conf.level = 0.95,
    t = NULL);

Arguments

x

a (non-empty) numeric vector of data values.

y

an optional (non-empty) numeric vector of data values.

alternative

a character string specifying the alternative hypothesis, must be one of "two.sided" (default), "greater" or "less". You can specify just the initial letter. [as Hypothesis]

mu

a number indicating the true value of the mean (or difference in means if you are performing a two sample test). [as double]

paired

a logical indicating whether you want a paired t-test. [as boolean]

var.equal

a logical variable indicating whether to treat the two variances as being equal. If TRUE then the pooled variance is used to estimate the variance otherwise the Welch (or Satterthwaite) approximation to the degrees of freedom is used. [as boolean]

conf.level

confidence level of the interval. [as double]

Details

Authors

sciBASIC.NET

Value

this function returns data object in these one of the listed data types: TwoSampleResult, TtestResult.

clr value class

Examples

[Package stats version 5.0.1.2389 Index]