10/15/2025

Ordered Alternatives

See GoogleDrive\Stat216-Nonparametrics-F2025\!Class Notes\Section6.2-Notes-BH.pdf

• Jonckheere-Terpstra Test Procedure
  • Calculate the Mann-Whitney counts for all possible pairs of treatments.
  • Jonckheere-Terpstra Statistic (J)
  • Jonckheere-Terpstra Test
    • Use the R command pJCK to get the test stat and p-value.
    • Example 6.2 - See JonckheereTerpstra.R
  • If k=2, the Jonckheere-Terpstra test is equivalent to the one-sided Mann-Whitney-Wilcoxon two-sample test.
  • L.S.A.
  • Dealing with ties
    • Use a permutation test to get an exact p-value.

Class time to complete our tenth lab activity - see GoogleDrive\Stat216-Nonparametrics-F2025\!Class examples and labs\Kruskal-Wallis - Lab Activity.RMD

Please read Section 6.3 for class on Friday and Monday. We will have a problem session on Friday.