Cliffd.test {reproducer}

Cliffd.test

Description

This function provides single-sided and two-sided tests of Cliff's d

Usage

Cliffd.test(x, y, alpha = 0.05, alternative = "two.sided", sigfig = -1)

Arguments

x

The data from one group

y

The data from the alternative group

alpha

The significance level of tests which also controls the values of the confidence interval (default 0.05)

alternative

This defines whether a one-sided test or a two-sided test is required (default "two.sided"). For a one-sided test use parameter values 'greater' or 'less' to define whether the d-value should be greater or less than zero.

sigfig

is the number of significant digits. If sigfig>0 the data in x and y is truncated to the specified number of significant digits.

Value

The values of Cliff's d and its standard error, the t-value, its pvalue and the upper and lower confidence interval.

Author(s)

Barbara Kitchenham and Lech Madeyski

Examples

a=c(1.2,3,2.2,4,2.5,3)
b=c(3,4.2,4,6,7,5.9)
Cliffd.test(a,b,alpha = .05,alternative='two.sided',sigfig = -1)
# A tibble: 1 x 7
#       d sqse.d d.tvalue d.pvalue d.ci.lower d.ci.upper d.sig
#   <dbl>  <dbl>    <dbl>    <dbl>      <dbl>      <dbl> <lgl>
#1 -0.861 0.0202    -42.7 1.20e-12     -0.896     -0.816 TRUE

Cliffd.test(b,a,alpha = .05,alternative='greater',sigfig = -1)
# A tibble: 1 x 7
#      d sqse.d d.tvalue d.pvalue d.ci.lower d.ci.upper d.sig
#  <dbl>  <dbl>    <dbl>    <dbl>      <dbl>      <dbl> <lgl>
#1 0.861 0.0202     42.7 5.99e-13      0.824          1 TRUE