mean. how do you find the mean???? add all the numbers divide by how many numbers you have did you...

Mean

How do you find the mean????

• Add all the numbers • Divide by how many numbers you

have

Did you know……Another name for mean is

AVERAGE

÷÷

Example

• Find the mean:

Example

• Cesario earned 75, 88, 92, 94, and 71 on the first 5 assignments. What was his score on the sixth assignment if the mean of the data was 85?

FIND THE MEAN FOR THE DATA SET

99, 103, 140, 153, 109, 92, 125, 110, 140.

19

1

7.50The cost of ten different portable MP3 players is

shown in the table. What is the mean cost?

2

FIND THE MEAN OF

{15, 7, 9, 25, 4}.

93

3

31Skylar wants to find the average of her friend's

weekly allowances. Use

the table and find the mean

weekly allowance.

4

JAMIE HAS SCORES OF 62, 75, AND 90 ON THREE OF HER HISTORY

EXAMS. WHAT DOES SHE NEED TO GET ON HER FOURTH EXAM IN

ORDER TO HAVE A MEAN OF 80?

119

5

THE TABLE SHOWS THE HEIGHT OF SIX DIFFERENT ROLLER

COASTERS AT AN AMUSEMENT PARK. FIND THE MEAN HEIGHT.

12

6

24The cost of the same quantity of gasoline at nine different gas stations is shown below. What is the mean cost of this amount of gas? Cost of Gas: $17, $18, $22, $15, $17, $16, $25, $21, and $20

7

142The number of points a basketball

team scored in eight different games is listed in the table shown. What is

the mean score of all the games?

8

Maxwell sold 43 magazines at his mom’s work, 32 at

his dad’s work, 18 around his neighborhood, and 3 at home. What is the mean of

the magazines he sold?

9

90

72

10

Adil races motorcycles for fun. So far, his lap times, in seconds, are 32, 35, 33, and 32. What time must Adil get on his final lap for his average lap time to be 32.6?