10/12/2016

Ordered Alternatives

• 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.
• Exercise 17 on p. 225

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