Arithmetic mean is a synonym for average, i.e., the sum of all values in a list divided by the number of values present.

The arithmetic mean of a set of values is the quantity commonly called "the" mean or the average. Given a set of samples {x_i}, the arithmetic mean is x^_ congruent 1/N sum_(i = 1)^N x_i. It can be computed in the Wolfram Language using Mean[list]. The arithmetic mean is the special case M_1 of the power mean and is one of the Pythagorean means. When viewed as an estimator for the mean of the underlying distribution (known as the population mean), the arithmetic mean of a sample is called the sample mean.

arithmetic-harmonic mean | arithmetic-logarithmic-geometric mean inequality | Carleman's inequality | cumulant | geometric mean | harmonic-geometric mean | harmonic mean | kurtosis | mean | mean deviation | mode | moment | population mean | power mean | Pythagorean means | root-mean-square | sample mean | sample variance | skewness | standard deviation | statistical median | trimean | variance | weighted mean

Mean

high school level (AP statistics, California grade 5 standard)