KtpTest {npordtests} | R Documentation |
Terpstra, Chang and Magel's KTP Test
Description
KtpTest
performs KTP test.
Usage
KtpTest(formula, data, alpha = 0.05, na.rm = TRUE, verbose = TRUE)
Arguments
formula |
a formula of the form |
data |
a data frame containing the variables in the formula |
alpha |
the level of significance to assess the statistical difference. Default is set to alpha = 0.05. |
na.rm |
a logical value indicating whether NA values should be stripped before the computation proceeds. |
verbose |
a logical for printing output to R console. |
Value
A list with class "owt" containing the following components:
statistic |
the KTP test statistic. |
mean |
the mean of the KTP test statistic. |
variance |
the variance of the KTP test statistic. |
Z |
the standardized test statistic. |
p.value |
the p-value of the test. |
alpha |
the level of significance. |
method |
the character string "KTP". |
data |
a data frame containing the variables in which NA values (if exist) are removed. |
formula |
a formula of the form |
Author(s)
Bulent Altunkaynak
References
Jonckheere, A. R. (1954). A Distribution-Free k-Sample Test Against Ordered Alternatives. Biometrika, 41, 133-145.
Terpstra, J., Chang, C.H., Magel, R.C. (2011). On the use of Spearman's correlation coefficient for testing ordered alternatives. Journal of Statistical Computation and Simulation, 81:11, 1381-1392.
Examples
library(npordtests)
## Data from Jonckheere (1954)
data(jdata)
KtpTest(Y~X,jdata)