How does BRIEF produce consistent keypoints with random sampling? [duplicate]

1. What is repeated random sampling?
2. How does random sampling affect validity?
3. What are the two key points of simple random sampling?
4. What is the main benefit of using simple random sampling?

What is repeated random sampling?

If this process of drawing random samples of size n from the same population were repeated many times, the means from all the samples would vary, and these means themselves would form a distribution, which is called a sampling distribution of the mean.

How does random sampling affect validity?

Random sampling uses chance to select the sampling units (participants) from the larger population. When random sampling has been employed in a study, the unbiasedness of the sampling method is strong evidence for external validity; we have a much higher belief in generalizations to the larger population.

What are the two key points of simple random sampling?

Simple random sampling methods

From this population, researchers choose random samples using two ways: random number tables and random number generator software. Researchers prefer a random number generator software, as no human interference is necessary to generate samples.

What is the main benefit of using simple random sampling?

Lack of Bias

The use of simple random sampling removes all hints of bias—or at least it should. Because individuals who make up the subset of the larger group are chosen at random, each individual in the large population set has the same probability of being selected.