1. COLLECTING DATA IN REAL LIFE

2. KEY VOCABULARY
Let´s listen to this song and watch the video.
http://www.youtube.com/watch?v=uydzT_WiRz4
Mean
- The total divided by how many
Median
- The middle number in size order
Mode
- The most common one.
Range
- How far apart your values are.

3. LET´S PRACTICE TOGETHER
HOW TO GE THE MEAN...

4. Let´s keep it up!!! NOW TRY THE
MEDIAN...

5. THE MEDIAN WITH AN EVEN
NUMBER OF DATA VALUES...

6. THE MEDIAN WITH AN EVEN
NUMBER OF DATA VALUES..

7. PRACTICING THE MODE...

8. LOOK AT ONE MORE...

9. EXAMPLES APPLYING THE CONCEPTS
LEARNT IN THE VOCABULARY
MEAN - The total divided by how many
5 children’s heights are 132cm, 142cm, 118cm,
120cm, and 118cm
What is the MEAN?
MEAN
Mean = 132 + 142 + 118 + 120 + 118 =
5
Mean =
630
5
= 126

10. Median
- The middle number in size order
5 children’s heights are
132cm, 141cm, 118cm, 120cm, and 118cm
DON´T FORGET TO ORDER THE
INFORMATION
FROM
SMALLEST TO BIGGEST
What is the MEDIAN?
MEDIAN
118cm, 118cm, 120cm, 132cm, and 141cm
120cm

11. Mode
- The most common one.
5 children’s heights are
132cm, 141cm, 118cm, 120cm, and 118cm
What is the MODE?
MODE
132cm, 141cm, 118cm, 120cm, and 118cm
118cm
118
So, the most common number (MODE) or the
value that is more times repeated here is 118.

12. Range
- How far apart your values are
5 children’s heights are
132cm, 141cm, 118cm, 120cm, and 118cm
What is the RANGE?
Biggest = 141cm
Smallest = 118cm
Here you can do a normal substraction to get the
RANGE...
RANGE
Biggest- Smallest so, 141 and 118 are 23 apart.
141 and 118 are 23 apart.