What I believe you are referring to is cluster sampling or cluster. In cluster sampling, the population is divided into clusters and all population members in the cluster are sampled.
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If all birds in one area would make a population. Not all birds can live together.
Community- Jazzy
no beacause their are all different types of birds and that why it cant make up a population
Statistics often requires one to make estimates of some measure (variable) about a set of units. The total number of such units is the population size. Note that population, in this context, need not refer to people. If the study is about household expenditure on food (in some area), then the population is all households and the population size is the number of households (in that area). If the study is about diversity of insects in a field, the population may be all 1-metre squares in the field, and the size of the population will be the number of such plots - which will equal the area of the field.
Population Distribution is the measure of people in a certain area. To be specific it looks at if the people living in a certain area are all clumped together or if they are evenly spread apart. In most cases, people are clumped together because they are attracted to the features of the land. For example, many people live in Toronto due to it being on the water, having a favourable land surface, very industrialized city, stable government, multicultural etc.