Math's/The Mean

Data Calculations: Finding the Mean (Average)

Looking at any data display graph can tell you a lot about the data, but there are some calculations you can do that will give you more information about the data, that you cannot get by just looking at a graph.

For example:  For the school fundraiser, Mya, Kura, Siunipa and Alicia have been given tickets to sell.

Names	Tickets
Mya	12
Kura	10
Siunipa	16
Alicia	14

How many tickets have the girls been given to sell altogether?

12 + 10 + 13 +  14 = 52

If they decided to sell the tickets altogether and then shared them equally among themselves, how many tickets would each one get?

52 divide by number of girls  (4)  = 13

By doing this, we are finding the ‘average’ or mean number of tickets that the girls would have.

The mean (average) number of tickets each girl would have is? 13

To find the mean for a list of scores (numbers), there are two steps.

Step 1: Add up all the scores

Step 2: Divide this total by the number of scores you added up.

For example: Find the mean of 5, 6, 7 & 10

Step 1: Add up all the scores. 5 + 6 + 7 + 10 = 28

Step 2: Divide this total by the number of scores. 28 divide by 4 = 7

Answer:  Mean (average) = 7   

Task 1:

Find the mean (average) for each list of scores.

1. 5, 9

5  + 9 = 14    14 divide by 2 = 7  mean is 7

2. 10, 16    

    10 + 16 = 26 divided by 2 = 13 mean is 13

3. 17, 13

     17 + 13 = 30 divided by 2 =  15 mean is 15

4. 5, 8, 8

     5 + 8 + 8 = 21 divided by 3 = 7 mean is 7

5. 7, 10, 13

      7 + 10 + 13 = 30 divided by 3 = 10 mean is 3

6. 3, 4, 5, 8

      3 + 4 + 5 + 8 = 20 divided by 4 = 5 mean is 5

7. 5, 8, 10, 13

     5 + 8 + 10 + 13 = 36 divided by 4 = 9 mean is 9

8. 9, 9, 13, 17

     9 + 9 + 13 + 17 = 48 divided by 4 = 12 mean is 12

9. 10, 30, 40, 40

     10 + 30 + 40 + 40 = 120 divided by 4 = 30 mean is 30

     

10. 4, 7, 9, 12, 13

      4 + 7 + 9 + 12 + 13 = 45 divided by 5 = 9 mean is 9

11. 4, 5, 8, 9, 10, 12

       4 + 5 + 8 + 9 + 10 + 12 = 48 divided by 6 = 8 mean is 8

12. 3, 5, 6, 8, 6, 4, 7, 9

     3 + 5 + 6 + 8 + 6 + 4 + 7 + 9 = 48 divided by 8 = 6 mean is 6

Extra

Each week the students in Mrs Thomas’s class are expected to read books, as part of their homework.  She hopes they will read 2 or 3 books each per week.  Last week, this is the number of books each student read.

4, 3, 2, 5, 1, 3, 4, 3, 2, 3, 4, 2

1. How many students in Mrs Thomas’s class?

      12 students

2. Find the mean number of books read by the students in her class.

        4, 3, 2, 5, 1, 3, 4, 3, 2, 3, 4, 2= 38

3. Would Mrs Thomas be happy with the class mean?  Explain why?

          Yes because she asked her class to read 2 or 3 books and working out the mean shows that the average student 3 books each.

Explaning

NAME:Siunipa                                                         DATE:  2 June 2016

This is my planning for the digestive system.

The food’s journey to the large intestine.

Have you ever wondered how your food gets into your body? Well today I am going to explain to you how the food gets through.

When the food goes into your mouth the teeth will help it form it into small little bits while the saliva makes the food softer for it to go down the esophagus.

While the food is still going down your esophagus the muscles of your esophagus is pushing and clamping the food down to go to your stomach.  

Then the food goes into your stomach and into gastric-acid.  After your food has gone into the acid it turns into liquid then moves to your small intestine.

As soon as possible the food goes to the small intestine it  takes all the good stuff like calcium,iron,protein,vitamins and fiber. It takes that kind of stuff because your body needs it so it can give energy to all your parts of your body.  

   

After the small intestine has taken all the good stuff it moves on to the large intestine and the large intestine takes the salt and water because your body needs the salt and water so it takes it and the waste comes out of your body.