Question

1. a random sample means that:

a. only volunteers are selected
b. every member of the population has an equal chance of being selected
c. the first few members of a group are selected
d. the largest or smallest values are selected

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Selecting only volunteers is a voluntary sample, not a random sample.
• Option B: By definition, a random sample requires that every member of the population has an equal probability of being chosen. This matches the concept of random sampling.
• Option C: Selecting the first few members is a convenience sample (e.g., sampling the first people you see), not random.
• Option D: Selecting extreme values (largest or smallest) is a biased sampling method, not random.

Answer:

B. Every member of the population has an equal chance of being selected