If Two Random Samples of Sizes N₁ and N₂ Are $\mu$

question 68

Multiple Choice

If two random samples of sizes n₁ and n₂ are selected independently from two populations with means $\mu$ ₁ and $\mu$ ₂, then the mean of $\bar { X } _ { 1 } - \bar { X } _ { 2 }$ equals:

• A)\(\mu\)₁ + \(\mu\)₂
• B)\(\mu\)₁ -\(\mu\)₂
• C)\(\mu\)₁ / \(\mu\)₂
• D)\(\mu\)₁ \(\mu\)₂

---

Definitions:

Emotional Regulation

The process by which individuals influence which emotions they feel, when they feel them, and how they express and experience them.

Primary Prevention

Actions that change overall background conditions to prevent some unwanted event or circumstance, such as injury, disease, or abuse.

Secondary Prevention

Actions that avert harm in a high-risk situation, such as using seat belts in cars.

Child Maltreatment

Refers to the abuse and neglect of children by parents or other caregivers, resulting in potential or actual harm to the child's health, survival, development or dignity.