CAS Exam MAS-II Spring 2019, Question 10
Study guide: Exam MAS-II
You are building a Linear Mixed Model with constant variance at each time point. The covariance matrix for the residuals for a given subject, \mathbf{R}_i, has a constant diagonal structure. Consider the following statements about \mathbf{R}_i.
I. This structure is often used in an experiment with repeated trials under the same condition. II. The residuals associated with observations of the same subject are assumed to be uncorrelated. III. This matrix requires only one parameter to be specified.
Determine which of the preceding statements are true.
- A) None of I, II, or III is true
- B) I and II only
- C) I and III only
- D) II and III only
- E) The correct answer is not given by (A), (B), (C), or (D)
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