Construct Confidence Intervals for a Mean Response
-When Constructing a Confidence

question 29

Multiple Choice

Construct Confidence Intervals for a Mean Response
-When constructing a confidence interval about the mean response of $y$ in a linear regression, the $t$ -distribution is used with _____degrees of freedom.

• A) \(n - 2\)
• B) \(n - 1\)
• C) \(\mathrm { n } + \mathrm { k } - 2\)
• D) \(n _ { 1 } + n _ { 2 } - 2\)

---

Definitions:

Variable Costs

Expenses that fluctuate in direct proportion to the level of output or production activity.

Stock Purchase

The action of buying shares in a company, which represents a portion of ownership in that corporation.

Government Regulations

Rules established by government aimed at influencing economic activity and protecting consumers, workers, and the environment.

Marginal Cost

The extra expense incurred for making an additional unit of a product, emphasizing its role in decision-making processes for production levels.