Before going to learn the sample mean formula, let us recall what is the sample mean. Sample mean represents the measure of the center of the data. Any population's mean is estimated using the sample mean. In many of the situations and cases, we are required to estimate what the whole population is doing, or what all are the factors going throughout the population, without surveying everyone in the population. In such cases sample mean is useful. An average value found in a sample is termed the sample mean. Let us see the sample mean formula and its applications in the upcoming sections.
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