1. Welcome

5. What will you learn today
What will you learn today? (something you did not know yesterday) By the end of this session I will be able to…
Calculate the Range
Calculate the mean
Calculate the median
Calculate the mode
Examination style questioning
Round, whole number, decimal places, mean, median, mode, modal, data, purpose, rearrange
Key Words

6. The Range Range = 𝐻𝑖𝑔ℎ𝑒𝑠𝑡 𝑁𝑢𝑚𝑏𝑒𝑟 −𝐿𝑜𝑤𝑒𝑠𝑡 𝑁𝑢𝑚𝑏𝑒𝑟 76 22 42 67 33 27
The difference between the highest number and the lowest number.
Range = 𝐻𝑖𝑔ℎ𝑒𝑠𝑡 𝑁𝑢𝑚𝑏𝑒𝑟 −𝐿𝑜𝑤𝑒𝑠𝑡 𝑁𝑢𝑚𝑏𝑒𝑟 76 22 42 67 33 27
76 – 22 = 54

7. The Range – what does this show us
H GH
I NCONSISTENT
L W
CONSISTENT

8. There are 3 types of average:
Mean Level 1
Add up the data and divide by how many bits there are.
Median Level 2
Put the data in order and pick the middle value.
Mode/Modal value Level 2
Most common.

9. Calculating the Mean Mean = 𝑇𝑜𝑡𝑎𝑙 𝑜𝑓 𝑡ℎ𝑒 𝑛𝑢𝑚𝑏𝑒𝑟 𝐻𝑜𝑤 𝑚𝑎𝑛𝑦 𝑛𝑢𝑚𝑏𝑒𝑟𝑠 24 22
divide
Mean = 𝑇𝑜𝑡𝑎𝑙 𝑜𝑓 𝑡ℎ𝑒 𝑛𝑢𝑚𝑏𝑒𝑟 𝐻𝑜𝑤 𝑚𝑎𝑛𝑦 𝑛𝑢𝑚𝑏𝑒𝑟𝑠 24 22 14 4 20 12
Mean = =
= 96 6
= 16

10. Find the mean and range of these sets of numbers: 5, 2, 7, 2, 8
A couple of questions:
Find the mean and range of these sets of numbers:
5, 2, 7, 2, 8
17, 21, 17, 26, 19, 20
45, 38, 25, 38, 39, 42, 45, 37
Mean: 4.8; Range: 6
Mean: 20; Range: 9
Mean: ; Range: 20

11. Songs to help you remember

12. Task Measure the 8 items to the nearest 25 grams (centre table)
Write the weight down
Calculate the range of weight you have recorded
Calculate the mean weight you have recorded
Level 2…
Calculate the median and mode weight of the items.

13. Individual Study
Choose which areas to develop depending on your own strengths and areas

14. Reflection of the lesson
What did you learn new today?
Why did you learn it?
How are you going to remember it?