There are two major types of data sources that can be used when a phenomenon or a variable is investigated: the population and the sample. Based upon the sample, various facts concerning the entire population can be deduced; this process is called statistical inference. A major problem of the inference is the variability.
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Volume (Year): 10(505) (2006) Issue (Month): 10(505) (December) Pages: 41-44 Download reference. The following formats are available: HTML
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