Which of the Following Statements Is True

question 19

Multiple Choice

Which of the following statements is true?

• A)Fixed effects estimation is not suitable when the unobserved cluster effect is correlated with one or more explanatory variables.
• B)Fixed effects approach is not applicable if the key explanatory variables change only at the level of the cluster.
• C)The ordinary least squares standard errors are incorrect when there is cluster effect.
• D)Random effects estimation can be applied to a cluster sample only if the unobserved cluster effect is correlated with one or more explanatory variables.

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Definitions:

Endoneurium

The innermost layer of connective tissue that surrounds individual nerve fibers within a nerve.

Perineurium

A protective sheath of connective tissue that surrounds a bundle (fascicle) of nerve fibers within a nerve.

Postsynaptic Membrane

The region of a neuron that receives and responds to neurotransmitters from the presynaptic neuron during synaptic transmission.

Receptor

A specialized cell or group of nerve endings that responds to changes in the environment, such as chemicals, heat, or light.