Page 138 - Data Science class 10
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B.  Long answer type questions:
            1.  Explain the different ways of subsetting data.                                    [CBSE Handbook]

            2.  What is the difference between two-way relative frequency table the two-way frequency type of table.
            3.  Compare Mean value with median value. In which case is median preferable?

            4.  What is a two-way relative frequency table? How is it different from two-way frequency table?
            5.  How to calculate Standard Deviation?                                              [CBSE Handbook]
            6.  How is variance derived from data points?
            7.  The runs scored in a cricket match by 11 players are as follows:

               7, 16, 121, 51, 101, 81, 1, 16, 9, 11, 16
               Find the mean, mode, median of this data.

            8.  Find the mean of the following data:
               a.  16, 18, 19, 21, 23, 23, 27, 29, 29, 35
               b.  2.2, 10.2, 14.7, 5.9, 4.9, 11.1, 10.5

               c.   11  ,   21  ,   51  ,   31  ,   21
                  4   2    2   4    2
            9.  Find the median of the following data:

               a.  27, 39, 49, 20, 21, 28, 38
               b.  10, 19, 54, 80, 15, 16
               c.  47, 41, 52, 43, 56, 35, 49, 55, 42

               d.  12, 17, 3, 14, 5, 8, 7, 15
           10.  Find the mode of the following data:
               a.  12, 8, 4, 8, 1, 8, 9, 11, 9, 10, 12, 8

               b.  15, 22, 17, 19, 22, 17, 29, 24, 17, 15
               c.  0, 3, 2, 1, 3, 5, 4, 3, 42, 1, 2, 0
               d.  1, 7, 2, 4, 5, 9, 8, 3
                                                                                                  Inter-Disciplinary

             Higher Order Thinking Skills                                                               (HOTS)
            1.  Calculate the mean of this dataset: [45, 78, 86, 48, 48, 75].

            2.  A fisherman is weighing each of 40 fishes. Their mean weight worked out is 40 gm and a standard deviation of 2.5 gm.
              Later it was found that the measuring scale was non-aligned and always under-reported every fish weight by 2.5 gm.
              Find the mean and standard deviation of fishes.


              Applied Project                                                                     Inter-Disciplinary
        Calculate the average height and weight for members in your family.




         Answers
         Exercise (Section A)
         A.   1. c.  2. a.  3. c.  4. b.  5. a.  6. b.  7. d.  8. c.  9. d.  10. c
         B.  1. Data science   2. Data Frame   3. Central tendency  4. Median      5. Mode
             6. Median       7. Arithmetic mean 8. Two-way         9. Tally marks   10. individual


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