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Weighted mean

{title2=$\bar x$}
{wiki}

The arithmetic mean of $x_1,\ldots,x_n$ is
$$
\bar x=\frac1n\sum_{i=1}^n x_i.
$$
It is the <weighted mean> with equal weights.

Arithmetic mean

Past exam of the mathematics course of the University of Cambridge / 2025 / iii / Paper 218 / 1 / f / Solution

{wiki=Arithmetic_mean}

The arithmetic mean, commonly referred to as the mean or average, is a measure of central tendency used to summarize a set of numbers. It is calculated by adding up all the values in a dataset and then dividing that sum by the total number of values.


Arithmetic mean ( $\overset{x}{ˉ}$ )

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Arithmetic mean (xˉ)

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