A random sample is a subset of a larger group or population that is selected in a completely unbiased and unpredictable manner. This means that every individual in the population has an equal chance of being chosen for the sample, making it a fair representation of the entire group. Random sampling is commonly used in research and statistical analysis to gather information and draw conclusions about a population without having to survey every single member. By using a random sample, researchers can confidently make generalizations about the larger group, making it a powerful tool in understanding and studying various phenomena.