If the Errors Are Heteroskedastic, Then

question 2

Multiple Choice

If the errors are heteroskedastic, then

• A)the OLS estimator is still BLUE as long as the regressors are nonrandom.
• B)the usual formula cannot be used for the OLS estimator.
• C)your model becomes overidentified.
• D)the OLS estimator is not BLUE.

---

Definitions:

Tracheostomy Collar

A device designed to secure a tracheostomy tube in place, ensuring that it remains aligned and does not cause injury to the trachea.

Emergency Response

The immediate and effective actions taken in response to a sudden and urgent situation, often to prevent further harm or damage.

Dislodging

The act of removing or knocking something out of its position, often referring to a foreign object in the body or a component in machinery.

Ventilator Bundle

A set of evidence-based practices aimed at reducing ventilator-associated pneumonia and other complications in mechanically ventilated patients.