What is required for a sample to be considered truly random?

Show Answers

A minimum of 100 individuals needs to be chosenAll subgroups within the population should be includedEach individual in the population has an equal probability of selectionRandom names must be picked from a phone directoryParticipants must undergo a preliminary screening by the researcher

Explanation

Option B is correct because a random sample ensures that every subgroup within the population is represented, allowing for unbiased and comprehensive results. The other options are incorrect as they either impose unnecessary conditions or misunderstand the concept of randomness in sampling.