1. Range & Mean Today you will need …… Orange Books Calculator Pen
Week 16
Today you will need ……
Orange Books
Calculator
Pen
Glue stick
Glue in and complete your tracking sheet to evaluate your skills before the lesson

2. Exam Results and Booking
December results
Next sitting is …
Monday 11th 1:30 pm
Do you have an exam?
Would you like one?
Put the date/time in your phone as a reminder!

3. 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
Examination style questioning
Round, whole number, decimal places, mean, median, mode, modal, data, purpose, rearrange
Key Words

4. The difference between the highest number and the lowest number.
The Range
The difference between the highest number and the lowest number.
Range = 𝐻𝑖𝑔ℎ𝑒𝑠𝑡 𝑁𝑢𝑚𝑏𝑒𝑟 −𝐿𝑜𝑤𝑒𝑠𝑡 𝑁𝑢𝑚𝑏𝑒𝑟 76 22 42 67 33 27
Calculate range of ages of the class
76 – 22 = 54

5. The Range – what does this show us
H GH
I NCONSISTENT
L W
CONSISTENT
The range tells you the spread.
If the range is small the data is bunched together. Show similarity in results
If the range is large then the data is spread apart more. Shows variation in results.

6. Mean = 𝑇𝑜𝑡𝑎𝑙 𝑜𝑓 𝑡ℎ𝑒 𝑛𝑢𝑚𝑏𝑒𝑟 𝐻𝑜𝑤 𝑚𝑎𝑛𝑦 𝑛𝑢𝑚𝑏𝑒𝑟𝑠
Calculating the Mean
divide
Mean = 𝑇𝑜𝑡𝑎𝑙 𝑜𝑓 𝑡ℎ𝑒 𝑛𝑢𝑚𝑏𝑒𝑟 𝐻𝑜𝑤 𝑚𝑎𝑛𝑦 𝑛𝑢𝑚𝑏𝑒𝑟𝑠 24 22 14 4 20 12
Mean =
Calculate the average shoe size of the group =
= 96 6
= 16

7. Example Question

8. Please don’t write on the worksheets
Individual Study
Choose which areas to develop depending on your own strengths and areas identified from your diagnostic
Computers available
Please don’t write on the worksheets

9. Reflection of the lesson Complete your tracking sheets
How do you now feel about todays topic
What did you learn new today?
What are your next steps?