A sample is random if
A)it is chosen by a method the investigator does not know anything about.
B)it is representative.
C)every member of the population has an equal chance at being selected for the sample.

Question

Quizplus · Accepted Answer

A random sample is one in which every member of the population has an equal chance of being selected for the sample. This ensures that the sample is representative and unbiased. A sample chosen by a method the investigator does not know anything about (choice A) may not be random and could introduce bias. Representation (choice B) is related to random sampling, but not sufficient on its own to ensure that a sample is random.

A Sample Is Random If