Why Is It Important That a Population Be Selected at Random

question 7

Multiple Choice

Why is it important that a population be selected at random when conducting polls?

• A) Random sampling is the most convenient and inexpensive sampling technique, allowing for frequent measurement.
• B) Without a random sample, the poll would be considered unscientific and therefore invalid.
• C) Random samples are the only accepted way to conduct public opinion polls in America.
• D) A sample must be completely random so as to not violate anti-discrimination laws.

---

Definitions:

Frustrating

Experiencing feelings of disappointment or dissatisfaction as a result of unmet expectations or obstacles.

Change

The process of becoming different, which can refer to an alteration in physical state, position, or behavior over time.

Anthropometric Measurements

Measurements of the human body's physical dimensions and composition, such as height, weight, and body mass index, used to assess growth, development, and health.

Height And Weight

Standard measures of a person's physical growth and body mass, often used to assess overall health.