Page 6 - Statistics presented by Dr. Sara Ismail Aborass
P. 6
9/8/2023
Quality control System
9
Samples and Populations
A population is the collection of all measurements of interest
to the experimenter, while a sample is a subset of
measurements selected from the population.
As an example of a real population, consider a production run
of multivitamin tablets that produces hundreds of thousands
of tablets. Although the population is finite, we usually would
not have the time or resources to test all the tablets for quality
control purposes. Hence, we select a sample of tablets for
analysis according to statistical sampling principles. We then
infer the characteristics of the population from those of the
sample.
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