What does the term 'Population Statistics' mean?

Population statistics is the number of individual organisms in a population.

Population statistics is the use of statistics to analyze characteristics or changes to a population.

Population statistics is the presence of a systematic difference in allele frequencies between subpopulations in a population possibly due to different ancestry, especially in the context of association studies.

Population statistics is a condition of demographic balance where the number of people in a specified population neither grows nor declines, considered as a social aim by some.

Population statistics is a study of a group of individuals taken from the general population who share a common characteristic, such as age, sex, or health condition.