Which Statement Regarding Primary Keys Is True

question 33

Multiple Choice

Which statement regarding primary keys is true?

• A) By definition, a primary key always consists of a single column.
• B) You can identify primary keys for tables by examining sample data.
• C) Some tables include more than one column that can be used as a primary key.
• D) All primary keys are values generated by database software.

Differentiate between short-range, medium-range, and long-range forecasting.

Calculate seasonal indices and understand their application in seasonal adjustment.

Understand the role of smoothing constants in exponential smoothing.

Interpret the correlation coefficient and its implications for variable relationships.

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Definitions:

Too Little Consumption

A situation where individuals or the economy as a whole are consuming less than optimal, possibly leading to underutilization of resources and a decrease in economic wellbeing.

Nonexcludable

A characteristic of public goods where it is not feasible to exclude individuals from using the good, leading to potential free-rider problems.

Common Resource

A resource, like air or water, that is accessible to all members of a society but subject to overuse and depletion.

Negative Externalities

Costs suffered by a third party due to an economic transaction they were not involved in.