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Grade 10 test results from 10 students

    12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17

Test out of 26

Calulate the mean: 




                                              2
12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17

Determine the mode: 




                                               3
12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17

Determine the median: 




                                               4
Calculate your percentage if your mark was 17. 




                                                  5
Calculate your PERCENTILE RANKING

Ranking: how does one mark compare
with all the others. 

      5 + 0.5(1) X 100
 PR =
         10

      = 55%


       12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17


                                                 6
Equation:     PR = B + 0.5(E) X 100
                       n

B: the number of scores Below a given score

E: the number of scores Equal to a given score, 
including the given score.
n: the total number of scores

** do not show with decimal values, round 
up to next whole number**

                                                   7
What if your mark was 12?



Percentage:  46%
       12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17

Percentile Ranking: 25th percentile




                                                 8
Your Assignment

  Page V­F­6

  Questions 1 ­ 7




                    9

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