Which of the Following Statements Are True

question 29

Multiple Choice

Which of the following statements are true?
(I) An MA(q) can be expressed as an AR(infinity) if it is invertible
(ii) An AR(p) can be written as an MA(infinity) if it is stationary
(iii) The (unconditional) mean of an ARMA process will depend only on the intercept and on the AR coefficients and not on the MA coefficients
(iv) A random walk series will have zero pacf except at lag 1

• A) (ii) and (iv) only
• B) (i) and (iii) only
• C) (i), (ii), and (iii) only
• D) (i), (ii), (iii), and (iv).

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Definitions:

Sentinel Event

A significant, unexpected occurrence involving death or serious physical or psychological injury, or the risk thereof, in a healthcare setting, which requires immediate investigation and response.

Fatal Air Embolism

A life-threatening medical condition where air bubbles enter the bloodstream and block blood vessels, leading to potentially fatal outcomes.

Central Line

A catheter placed into a large vein, typically in the neck, chest, or groin, to administer medication or fluids, obtain blood tests, and directly obtain cardiovascular measurements.

Urinary Tract Infection

An infection that can affect any part of the urinary system, including kidneys, ureters, bladder, and urethra.