Arithmetic mean

\bar{x}=\dfrac{1}{n}\sum_{i=1}^{n}x_i

Result unit: — (liczba)

What it describes

The sum of all values divided by their count.

\bar{x}

arithmetic mean

x_i

data values

n

number of data values

We add up all the values and divide by how many there are — "as if everything were spread out evenly."

The average value of a data set; grades, measurements.

Data: 4, 6, 8, 10. Find the arithmetic mean.

Substitutionsum

=28

n=4

Result

\bar{x}=\dfrac{28}{4}=7

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