Which of the Following Models Is Considered for a Quarterly

question 87

Multiple Choice

Which of the following models is considered for a quarterly time series that seems to change on average by a fixed amount and seems to have seasonality?

• A) ln(y_t)= β₀ + β₁d₁ + β₂d₂ + β₃d₃ + β₄t + ε_t
• B) y_t = β₀ + β₁d₁ + β₂d₂ + β₃d₃ + β₄t + ε_t
• C) ln(y_t)= β₀ + β₁d₁ + β₂d₂ + β₃d₃ + β₄d₄ + β₅t + ε_t
• D) y_t = β₀ + β₁d₁ + β₂d₂ + β₃d₃ + β₄d₄ + β₅t + ε_t

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Definitions:

Ultrasound

A medical imaging technique that uses high-frequency sound waves to produce images of structures within the body, commonly used in pregnancy and diagnostics.

Germinal Period

The first two weeks of prenatal development after conception, characterized by rapid cell division and the beginning of cell differentiation.

After Conception

The period of time following the moment of conception, referring to the development of the embryo and fetus during pregnancy.

False Positive

The result of a laboratory test that reports something as true when in fact it is not true. This can occur for pregnancy tests, when a woman might not be pregnant even though the test says she is, or during pregnancy, when a problem is reported that actually does not exist.