The Z-Test for Two Means Is Appropriate Whenever the Two $\sigma_{1}, \sigma_{2}$

question 9

Multiple Choice

The z-test for two means is appropriate whenever the two population variances ( $\sigma_{1}, \sigma_{2}$ ) are ______.

• A) unknown
• B) known
• C) normally distributed
• D) beyond the critical value for statistical significance

---

Definitions:

Ability to Understand

The capacity to grasp and comprehend information, situations, or perspectives accurately and effectively.

Networking Activities

The process of interacting with others to exchange information and develop professional or social contacts.

Career Success

Career Success is the achievement of personal work goals and objectives through professional development, recognition, and advancement.

Organizational Politics

The use of power and social networking within an organization to achieve changes that benefit the organization or individuals within it.