Similarly, or rather confusingly, the sample mean in statistics is often indicated with a capital X̄. In the specific case of the population mean, rather than using the variable x̄, the Greek symbol mu, or μ, is used. The mean is often denoted as x̄, pronounced "x bar," and even in other uses when the variable is not x, the bar notation is a common indicator of some form of the mean. The equation for calculating the arithmetic mean is virtually identical to that for calculating the statistical concepts of population and sample mean, with slight variations in the variables used: In this form, the mean refers to an intermediate value between a discrete set of numbers, namely, the sum of all values in the data set, divided by the total number of values. In its simplest mathematical definition regarding data sets, the mean used is the arithmetic mean, also referred to as mathematical expectation, or average. Depending on the context, whether mathematical or statistical, what is meant by the "mean" changes. The word mean, which is a homonym for multiple other words in the English language, is similarly ambiguous even in the area of mathematics. Related Statistics Calculator | Standard Deviation Calculator | Sample Size Calculator
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