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Which of the following is an example of random sampling?
I. Picking out of a hat to assign each of three classes to an experimental condition.
II. Having a computer generate a random list of 100 high school students.
III. Approaching any 50 students during sixth-period lunch.
(A) I only
(B) II only
(C) III only
(D) I and II
(E) I, II, and III
Spoiler
Answer
(B) II only
Spoiler
Explanation
Of the three methods presented, only having a computer generate a random list of names is an example of random sampling. The first example illustrates random assignment and not random sampling. Sampling is the process of choosing a group of participants from a population. Once sampling has been completed, one might assign the participants to conditions as described in I. Finally, approaching 50 students during a lunch period does not constitute random sampling even if the person who picks the people tries to do so randomly. Remember that the word random has a very specific meaning in the context of research. Random sampling means that all members of the population had an equal chance of being selected, and people are unable to be so scrupulously unbiased.
Posted : 22/01/2024 5:24 pm