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Program Latih Tubi SPM 2012 Matematik Tambahan Kertas 2

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     TOPIC: STATISTICS

1. A set of examination marks x1, x2, x3, x4, x5, x6 has a mean of 5 and a standard deviation of 1.5.
    (a) Find
          (i) the sum of the marks, x,
          (ii) the sum of the squares of the marks, x2.                                                 [3 marks]

     (b) Each mark is multiplied by 2 then 3 is added to it. Find, for the new set of marks,
         (i) the mean,
         (ii) the variance.                                                                              [4 marks]




2.   Table 6 shows the frequency distribution of the marks of a group of students

                        Score               Number of pupils
                        1 – 10                    5
                       11 – 20                    8
                       21 – 30                   20
                       31 – 40                   10                       Table 6
                       41 – 50                    7

     (a) Use the graph paper to answer this question.

         Using a scale of 2 cm to 10 cm scores on the horizontal axis and 2 cm to 2 pupils on the vertical axis, draw
         a histogram to represent the frequency distribution of the scores.
         Find the mode score.                                                                               [4 marks]

     (b) Calculate the standard deviation of the marks.                                                   [4 marks]




3472/2 – ADDITIONAL MATHEMATICS PAPER 2 - PROGRAM LATIH TUBI SPM 2012

				
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Description: Program Latih Tubi SPM 2012 Matematik Tambahan Kertas 2