6 terms

Mean

For a set of n numbers: total sum / n

Median

Middlemost value when numbers are arranged in ascending order; for an even amount of numbers, take the average of the middle two

Mode

The number that occurs most frequently

Weighted Average

(proportion) x (group A average) + (proportion) x (group B average) + ...

Standard Deviation

SD = Sqrt((a-m)^2 + (b-m)^2 +(c-m0^2) +...)/n)) ;where a, b, and c are a set of numbers and m is the mean.

The standard deviation represents the average distance the data values are away from the mean.

The standard deviation represents the average distance the data values are away from the mean.

Variance

value inside the square root of the standard deviation

Variance=SD^2

Variance=SD^2