The matrix below describes what kind of covariance structure in a multilevel model?
$\left( \begin{array} { c c c c }
\sigma _ { 1 } ^ { 2 } & \sigma _ { 21 } & \sigma _ { 31 } & \sigma _ { 41 } \
\sigma _ { 21 } & \sigma _ { 2 } ^ { 2 } & \sigma _ { 32 } & \sigma _ { 42 } \
\sigma _ { 31 } & \sigma _ { 32 } & \sigma _ { 3 } ^ { 2 } & \sigma _ { 43 } \
\sigma _ { 41 } & \sigma _ { 42 } & \sigma _ { 43 } & \sigma _ { 4 } ^ { 2 }
\end{array} \right)$
A)Variance components
B)Diagonal
C)Unstructured
D)AR(1)

Question

The matrix below describes what kind of covariance structure in a multilevel model?
$\left( \begin{array} { c c c c } 
\sigma _ { 1 } ^ { 2 } & \sigma _ { 21 } & \sigma _ { 31 } & \sigma _ { 41 } \
\sigma _ { 21 } & \sigma _ { 2 } ^ { 2 } & \sigma _ { 32 } & \sigma _ { 42 } \
\sigma _ { 31 } & \sigma _ { 32 } & \sigma _ { 3 } ^ { 2 } & \sigma _ { 43 } \
\sigma _ { 41 } & \sigma _ { 42 } & \sigma _ { 43 } & \sigma _ { 4 } ^ { 2 }
\end{array} \right)$
A)Variance components
B)Diagonal
C)Unstructured
D)AR(1)

Quizplus · Accepted Answer

This matrix represents an unstructured covariance structure because each element can have a unique value, indicating that there is no specific pattern or restriction on the relationships between different levels or units.

The Matrix Below Describes What Kind of Covariance Structure in a Multilevel