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SAI International School
                                                       CLASS - X

               Mathematics
               CHAPTER-14: Statistics

               HOME ASSIGNMENT-2



               SUBTOPIC : Mode Of Grouped Data


              1.What is the frequency of the class preceding the modal class for the following frequency table?
                Class                      1 - 3       3 - 5       5 - 7      7 - 9       9 - 11

                Frequency                  7           8           2          2           1


                       Ans:7
               2.Calculate the mode for the following frequency distribution:

                Class             25 - 30    30 - 35     35 - 40     40 - 45     45 - 50    50 – 55

                Frequency         25         34          50          42          38         14


               Ans:28.33

               3.The mode of the following series is 36. Find the missing frequency in it.

               Class Interval       0 - 10   10 - 20    20 - 30   30 - 40    40 - 50    50 - 60    60 - 70


               Frequency            8        10         x         16         12         6          7

               Ans:10

               4.Write the following distribution as less than type cumulative frequency distribution :


               C . I.         0 - 10    10 - 20   20 - 30   30 - 40   40 - 50   50 - 60   60 - 70   70 - 80


               Frequency          5          3        4         3         3         4         7        9


               5.Write the following distribution as more than type cumulative frequency distribution :

               C . I           50 -55       55 - 60      60 - 65     65 - 70      70 -75       75 - 80

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