mean	Sum of values divided by the number of values
median	Middle value after sorting; average the two middle values if needed
mode	Most frequent value; there may be several or none
range	Maximum value minus minimum value
sample	A subset of a population
population	The entire group of interest
outlier	A value unusually far from other observations
frequency	Number of times a value or category occurs
probability	A measure of likelihood, from 0 to 1
independent events	Events where one occurring does not change the probability of the other