A Level Biology Practice Exam

What type of sampling involves selecting a random subset from a larger group?

1. Systematic sampling

2. Stratified sampling

3. Random sampling

4. Convenience sampling

The correct answer is: Random sampling

Random sampling is the method that involves selecting a random subset from a larger group, allowing each individual in the population an equal chance of being chosen. This technique is significant because it helps to minimize bias and ensures that the sample is representative of the overall population. In doing so, results obtained from a random sample can be generalized to the larger group with a higher degree of confidence. The effectiveness of random sampling lies in its ability to provide a diverse selection of participants, reflecting the characteristics of the entire population. It's commonly used in various scientific research and surveys to obtain unbiased data that accurately represent the population being studied.