A Population Has a Known Standard Deviation of 25

question 53

Multiple Choice

A population has a known standard deviation of 25. A simple random sample of 49 items is taken from the selected population. The sample mean (x-bar) is 300. What is the margin of error at the 95% confidence level?

• A) 8
• B) 293
• C) 7
• D) 308

---

Definitions:

Suicidal Thoughts

Thoughts about or an inclination towards ending one's own life.

Major Depressive Disorder

A mental disorder characterized by a persistent and intense feeling of sadness or despair and/or a loss of interest in activities, often accompanied by other symptoms such as changes in sleep, appetite, and energy level.

Depression

A psychiatric disorder characterized by pervasive feelings of sadness, emptiness, or hopelessness, often accompanied by a lack of energy and interest in life.

Major Depressive Disorder

A mental health disorder characterized by persistent sadness, lack of interest in activities, and other symptoms that interfere with daily functioning.