Description Usage Arguments Details Value References See Also Examples
View source: R/Wilcox.m.test.R
This function allows the user to conduct the 1-Sample Wilcoxon Sign Rank Hypothesis Test for Medians using the probability values from the exact distribution of W.
1 2 | Wilcox.m.test(dat, m_h0, alpha = 0.05,
alternative=c('greater', 'lesser', 'noteq'), normal_approx=FALSE)
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dat |
data vector relating to the sample the user is performing the hypothesis test for |
m_h0 |
The value of the median as specified by the null hypothesis H_0 |
alpha |
The significance level of the hypothesis test (default = 0.05) |
alternative |
The sign of the alternative hypothesis. e.g 'greater' - H_1:m>m_h0 , 'lesser' - H_1:m<m_h0, 'noteq' - H_1:m!=m_h0 |
normal_approx |
Should the normal approximation test be applied? (default = FALSE) |
This hypothesis test allows breaking of ties, and the number of ties broken is also reflected in the printed results.
Prints out the results of the tests, and returns 3 values- test statistic, p-value, and the significance level of the test, alpha
Peter J. Bickel and Kjell A. Doksum (1973). Mathematical Statistics: Basic Ideas and Selected Topics. Prentice Hall.
wilcox.test
for the same tests applied to 2 sample problems
but is not able to break ties
1 2 3 4 5 6 7 8 9 10 | ##Given some data: 3, 4, 7, 10, 4, 12, 1, 9, 2, 15
##If we want to test the hypotheses H_0: m=5 against H_1: m>5
##without using normal approximation:
vec = c(3, 4, 7, 10, 4, 12, 1, 9, 2, 15)
res = Wilcox.m.test(dat = vec, m_h0 = 5,
alternative = 'greater', normal_approx = FALSE)
##If we want to apply the normal approximation(Z-test), with the same hypotheses:
res = Wilcox.m.test(dat = vec, m_h0 = 5,
alternative = 'greater', normal_approx = TRUE)
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