average

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

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

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