Means

Mean	[[$ \bar{x} = \dfrac{x_1+x_2+x_3+...+x_n}{n} $]]​
Weighted average	[[$ \bar{x} = \dfrac{q_1x_1+q_2x_2+...+q_nx_n}{q_1+q_2+...+q_n} $]], where [[$ q_1, q_2,...,q_n $]] are wheights. ​​

The mode, or type value, means the most common, most common value of a variable.

The median means the mean value (or the average of the two mean values) when the data is arranged in order of magnitude.

Scatter numbers

The standard deviation indicates how far the values ​​of the variable are from the mean on average.

The range indicates how in which interval the observations vary.

The length of the range is the difference between the maximum and minimum values ​​of the variable.