Mean, Median, Mode

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Please watch video on  Mean, Median, and Mode. We are only focusing on Mean and Mode today.


When solving problems, you may use a calculator. 
Definitions:
Definition of Mean: THE AVERAGE OF ALL NUMBERS: ARRANGE ALL THE NUMBERS FROM LEAST TO GREATEST, THEN YOU DIVIDE BY THE NUMBER OF NUMBERS.
FORMULA:  SUM OF TERMS             =  MEAN
                       NUMBER OF TERMS

Example:   9,4,3,4 rearrange the numbers from lowest to highest
                  3,4,4,9
                   Add all the numbers together, 3+4+4+9= 20
                    Count all the numbers we have altogether, which is 4
Now divide 20= 5
                     4

The mean is 4. 

Definition of Mode: the number that occurs most often.

example: 3,4,4,9.   What number do you see often? 
                                     4
                                The mode here is 4 because it appears more than once. 

Remember that you can use the calculator. 



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