1. Mean: average 2. Median: middle number 3. Mode: most often
Statistics: Chapter 8
Mean: average 2. Median: middle number 3. Mode: most often

2. MEAN: the average of all the numbers
Add up all numbers and then divide by how many numbers there are.
Example: What is the Mean of these numbers? 6, 11, 7
Add the numbers: = 24
Divide by how many numbers (there are 3 numbers): 24 / 3 = 8
The Mean is 8

3. MEDIAN: the middle number in a sorted list
To find the median, place the numbers in value order and find the middle number.
Example: find the Median of {12, 3 and 5}
Put them in order: 3, 5, 12
The middle number is 5, so the median is 5.
Note: If there are two middle numbers take the average of the two

4. MODE: the number that appears most often
To find the mode, first put the numbers in order, then count how many of each number.
Example: find the mode of these numbers: 3, 7, 5, 13, 20, 23, 39, 23, 40, 23, 14, 12, 56, 23, 29
Put the numbers in order: 3, 5, 7, 12, 13, 14, 20, 23, 23, 23, 23, 29, 39, 40, 56
Decide which number appears most often: 23, so the mode is 23.
Notes:
You can have more than one mode = bimodal
You can have more than two modes = multimodal