Mean,Median,Mode and range

Mean,Median,Mode and range.

The mean is the ‘average’ of all numbers or scores.

1.              Add up all the scores.
2.              Divide this total by the number of scores you added up.

The median is the middle score,once the scores are in order.

1. To find the median,scores must be placed in order from smallest to biggest.  Start counting one off each end.  Keep going until you have one score left in the middle.

The mode is the most common score, there may be more than one or none at all.

Task 1 :

Find the mean,median,mode and range for each list of scores below.

1. 2,2,4,6,11                    25 ÷ 5 = 5         4           2        11 - 2 = 9
2. 4,8,8,9,10,12,12          63 ÷  7 = 9        9          12 & 8     12 - 4 =8    
3. 8,13,19,20                   60 ÷  4 =15       0           0             20 - 8= 12  
4. 2,2,5,7,9                      25 ÷  5 =5         5            2            9 - 2 = 7
5. 3,6,8,8,9,10,12            56 ÷  7 = 8        8            8            12 - 3 = 9     
6. 0,7,8,14,14,27             70 ÷  6 = 11      14          14          27 - 0 = 27

Task 2:

Martin and Jack both like cricket.  During the cricket season they both score many runs, but who is the better batsman?  Each batsman had five turns at bat and scored the following runs.  Martin said, “I’m better batsman!” Is Martin correct?

Martin        9,9,14,21,47

Jack          7,13,22,22,36

1. Find the mean for both artin and Jack’s batting scores.

           Jacks: 100 ÷ 5 20

           Martins: 100 ÷  5 = 20

    2.    Find the median for both Martin and Jack batting scores.

           Martin: 14

           Jack: 22

    3.   Find the mode for both Martin and Jacks batting score.

          Jack: 22
          Martin: 9

  4.     Find the range for both Martin and Jacks batting scores.

          Martin: 47 - 9 = 38

          Jack:  36 - 7 = 29

5.       Was Jack correct?

           No both of them are equally good.

Task 3:   

There are two groups of 10 students in Room 11.  They all sat the same test. Their test results are as listed.  Mya, who is in Group B, said “Our group is better as we had three students who got 10 out of 10!” Is Mya correct?

Group A         4,4,5,5,5,6,7,7,8,9

Group B         1,2,3,3,4,5,10,10,10

1.    Find the mean for both test results.

                 G.A:59

As you can see in my piece of work here I have learnt about the median, mean and the mode so here is some work I did with my reliever teacher. We also did some word problems were we have to find the median and the mode.