If a Random Sample of Size N Is Drawn from a Normal

question 12

Multiple Choice

If a random sample of size n is drawn from a normal population, then the sampling distribution of the sample mean $\bar { X }$ will be:

• A) normal for all values of n.
• B) normal only for n > 30.
• C) approximately normal for all values of n.
• D) approximately normal only for n > 30.

---

Definitions:

Herfindahl-Hirschman Index

A measure of market concentration used to determine the level of competition within an industry.

Market Share

The portion of a market controlled by a particular company or product.

Oligopolistic Models

Economic models that describe markets in which a few firms dominate, often leading to pricing and output decisions that consider the actions of competitors.

Cartel

An agreement among competing firms to control prices or exclude entry of a new competitor in a market, often in order to maximize the members' profits at the expense of consumers.