CAS Exam MAS-II Fall 2019, Question 12
Study guide: Exam MAS-II
You are performing F-tests to test linear hypotheses about multiple fixed effects in a Linear Mixed Model. You use the Kenward-Roger method to approximate the denominator degrees of freedom. You are given the following statements about the Kenward-Roger adjustment:
I. This adjustment is necessary because the variance of the fixed effects is biased downward due to the estimation of the variance-covariance matrix. II. This adjustment accounts for the presence of random effects and correlated residuals in the Linear Mixed Model. III. In general, the adjustment is more critical for data sets with larger sample sizes than for smaller sample sizes.
Determine which of the proceeding statements are true.
- A) I only
- B) II only
- C) III only
- D) I, II and III
- E) The answer is not given by (A), (B), (C), or (D)
Answer this question and see the worked solution