Question 1:
Which is best practice?
- A. Contrasts of interest are determined by research questionsand should be explicitly stated at the planning stage of anexperiment.
- B. Contrasts of interest are best determined during theexploratory data analysis stage.
- C. The contrasts one should investigate are determined by theobserved difference between treatment means; bigger observeddifferences are more interesting
Question 2
Which of the following is a contrast and orthogonal to
?1=4?1?(?2+?3+?4+?5)
- A.
?2=?1??3
- B.
?3=4?1+(?2+?3+?4+?5)
- C.
?4=?2??3
Question 3
A contrast is a comparison of means.
Question 4:
Which of the following qualifies as a contrast?
- A.
?1=0.5?1+0.5?2
- B.
?2=??1–0.5(?2+?3)
- C.
?3=?1+?2+?3
- D.
?4=13(?1+?2+?3)
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