1. Average of data Mode Mean Median

2. Which is the best class A OR

3. class B

4. What has it changed? It is easier to discuss which is the best? How many Suficient are in each class ? Do we have enough information to find out which is the best?

5. Can we work out the Mean for each class? Class A 4x0,25+5x0,50+ +7,5x0,13+9x0,12 = =5,5 Class B 4x0,50+5x0,30+ +7,5x0,07+9x0,13= =5,2

6. Which is the best ?

7. Median Is the middle value when the values are put in order of size

8. EXAMPLE A football team scored : 2, 4, 0, 1, 3, 3, 3, 6, 2, 4 goals in the first 10 matches

9. Let’s put in order of size, as there are 10 values, we get the 5th and the 6th, and (3+3)/2=3 3, 3 3, 4, 4, 6 0, 1, 2, 2,

10. If there were 11 values: 0, 1, 2, 2, 2, 3, 3, 3, 4, 4, 6 The median will be the 6th value: 3 0, 1, 2, 2, 23, 3, 4, 4, 6

11. Quick test Charlotte made this table for the number of minutes students were late Number of minutes late (x) 01234Total Frequency104632 25

12. The mean The median The mode The range Calculate:

13. The mean is The median is The mode is The range is 1,32 0 1 4

14. Martina and her friend Sara both fancy the same boy in their class. In their passionate state, they’ve been picking daisies in the park. Sara has challenged Martina whoever has more petals on their daisies on average can ask the boy out. He loves me

15. www.outfordemocracy.org/arch/2007_05.html

16. Standard deviation The most spread: Class D Standard Deviation 3,55 then, Class C, 2,87

17. Class B, Standard deviation,2,87 And, the lowest spread, Class A, Standard Deviation, 2,16