Question

good empirical research always utilizes this kind of grouping in the scientific method?
sample random population
random sample population

Explanation:

Good empirical research relies on a representative subset of the full population to draw valid, generalizable conclusions. A random sample is a group selected randomly from the population, ensuring each member has an equal chance of being included. This minimizes bias and allows researchers to apply findings to the larger population, which is a core requirement for rigorous empirical research using the scientific method. A non-random sample may be unrepresentative, while studying the full population is often impractical. "Random population" is not a standard term in this context.

Answer:

Random Sample