due to the Eisteddfod we didn't get chance to hand out the homework, therefore you will have it tomorrow and it won't need to be returned until Tuesday 7th March.
*Big Spelling don't forget to check yourself on word list 3 ready to check yourself on Monday.
The work will be differentiated in class but here is a reminder of the different types of averages -
Averages
Mode (Most Common)
The number that is in the list the most times.
E.G: 1 ,4 ,4 ,4 ,2 ,9 ,4
The most common number in this list is the number 4 so the MODE is 4.
Median (The Middle Number)
Once the list of numbers has been put in order smallest to biggest the Median is the number in the middle of the list.
E.G: 1 ,4 ,4 ,4 ,2 ,9 ,4
1st put the numbers in order smallest to biggest – 1 ,2 ,4 ,4 ,4 ,4 ,9
2nd cross of each number (1 from each end of the list) until there is only 1 left in the middle
1, 2 ,4 ,4 ,4 ,4 ,9
4 is the number in the middle of the list so the MEDIAN is 4.
What if there is no middle number??
Sometimes there will not be a middle number! (If you have an even number of numbers)
E.G
Find the median of these numbers:
1, 8, 5, 2, 9, 4
Put them in order…
1, 2, 4, 5, 8, 9
Can you see there is no one middle number?
1, 2, 4, 5, 8, 9
There are TWO middle numbers!
The median is HALF WAY between these 2 numbers.
Q. What is half way between 4 and 5?
A. 4.5.
So the median will be 4.5.
Mean (The mean one!!!)
Add all the numbers in the list together then divide by how many numbers are in the list.
E.G: 1 ,4 ,4 ,4 ,2 ,9 ,4
1st add the numbers together 1+4+4+4+2+9+4 = 28
2nd divide the answer by how many numbers are in the list 28 ÷ 7 = 4
So the MEAN is 4.
Range (The difference)
Find the difference between the biggest and the smallest number.
E.G: 1 ,4 ,4 ,4 ,2 ,9 ,4
The biggest number is 9 and the smallest number is 1. Calculate: 9 – 1 = 8
The Range is 8.
