A measure of central tendency.

Numerical Average:

(2+3+4+5)/4 = 16/4 = 4

A measure of central tendency.

Data Set:

6,7,8,9,9

8 is the medium.

Data Set:

5,6,8,9,11,12

8.5 is the medium

--- (8+9)/2 = 8.5 ---

The difference between the highest values and lowest values in a given set of numbers.

Example:

12,14,17,19,19,22

Difference: 22-12 = 10

Range is 10.

A measure of central tendency.

Data Set 1:

2,3,3,3,5,5,9,10 ---- Mode: 3

Data Set 2:

5.2, 5.4, 5.5, 5.6, 5.8, 5.9, 6.0 ---- Mode = none

Data Set 3:

1,1,2,5,6,7,7,9,11,12 ---- Mode: 1 AND 7

Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event.