Which of the Following Is Not a Necessary Condition for a Variable

question 2

Multiple Choice

Which of the following is not a necessary condition for a variable to be stationary?

• A)E(y_t)= \(\mu\)
• B)var(y_t)= \(\sigma\) ²
• C)cov(y_t,y_t+s)= cov(y_t,y_t-s)= \(\gamma\)_s
• D)E(y_t - y_t-1)= \(\pi\)

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Definitions:

Manufacturing Overhead Costs

Indirect costs related to manufacturing that do not directly tie to a specific product, such as factory utilities or salary of the production manager.

Product Costs

Costs directly associated with the creation of a product, including direct materials, direct labor, and overhead.

Total Variable Cost

The sum of all costs that vary with the level of production or sales, such as materials and direct labor.

Direct Costs

Expenses that can be directly traced to a specific cost object, such as a product, department, or project.