1. Statistical Measures M M O D E E A D N I A R A N G E

2. Mean The mean is the same as average. To find the mean:
First, add up all of the numbers in the set of data.
Then, count the number of addends.
Last, divide that sum by the number of addends.
Example

3. Example of Mean ÷ = 25 5 5 ? Set of data: 4,6,5,7,3
Step 1: Add up all the numbers in the set of data.
What do you get?
Step 2 Count the number of addends.
Step 3 divide the sum by the number of addends. 25 5 5 ÷ = ?

4. Example of Mean ÷ = Set of data:
Step 1: Add up all the numbers in the set of data.
What do you get?
Step 2 Count the number of addends.
Step 3 divide the sum by the number of addends. ÷ =

5. Mode The mode is the number that appears the most in a set of data.
To find the mode:
First, look for numbers that are in the data more than once.
Last, figure out which number is in the data the most.
Example

6. Example of Mode 3 2 3 Set of data: 3, 15, 16, 3, 2, 2, 5, 4, 3
Step 1: Look for numbers that are listed more than once.
Step 2: Which one is in the data set the most times? 3 2 3

7. Example of Mode Set of data:
Step 1: Look for numbers that are listed more than once.
Step 2: Which one is in the data set the most times?

8. Median The median is the middle number in a set of data.
To find the median:
Put the numbers in order from least to greatest.
Find the number that is in the exact middle.
Example

9. Example of Median x x x x Set of data:
Step 1: Put the numbers in order from least to greatest.
Step 2: Find the number that is in the exact middle. 3 14 2 7 15 x 3 2 7 14 15 x x x

10. Example of Median Set of data:
Step 1: Put the numbers in order from least to greatest.
Step 2: Find the number that is in the exact middle.

11. Range
The range of a set of data is the maximum number minus the minimum number.
To find the range:
Find the maximum (greatest) number.
Find the minimum (least) number.
Subtract the minimum number from the maximum number.
Example

12. Example of Range 19 3 16 Set of data: 12, 3, 4, 19, 8, 9
Step 1: Find the maximum.
Step 2: Find the minimum.
Step 3: Subtract the minimum from the maximum. 19 3 16

13. Example of Range Set of data: Step 1: Find the maximum.
Step 2: Find the minimum.
Step 3: Subtract the minimum from the maximum.