Because the whole population might be too large to sample.
A good example is the population of the world. At nearly 7 billion people, it would be unrealistic to sample each person to determine some factor that you are looking at. Generally, we sample a subset of the population, taking into account differences (or errors) that might result, in this case, regional and cultural, in order to estimate the behavior of the larger population.
large
A sample consists of a small portion of data when a population is taken from a large amount.
The sample must be large and random.
Assuming that the population was carefully defined, the sample population was carefully and correctly chosen, and that there were significant results, then the implication is that the results of the study, within the confidence limits indicated, hold true for the population at large.
its time consuming and expensive if its a large sample you need or a big target population
A sample! And the large group is called the population.
large
A sample consists of a small portion of data when a population is taken from a large amount.
The sample must be large and random.
that you have a large variance in the population and/or your sample size is too small
Span the full spectrum of a population's genetic variation. <apex> Reflects the genetic variation of a population...
A large trial is necessary to provide good sample that is representative of the population
Representative Sample.
Yes, but that begs the question: how large should the sample size be?
mass survey; a large sample of the
Assuming that the population was carefully defined, the sample population was carefully and correctly chosen, and that there were significant results, then the implication is that the results of the study, within the confidence limits indicated, hold true for the population at large.
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