Cumulative frequency - Download as DOC by xdKhg06

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									                    Year 10 Module 1 exam revision
Cumulative frequency

Age (a Cumulative                                200
                                                 190
years) frequency                                 180
a < 10                                           170
                                                 160
a < 20                                           150
                                                 140
a < 30



                          Cumulative frequency
                                                 130
a < 40                                           120
                                                 110
a < 50                                           100
                                                 90
a < 60                                           80

a < 70                                           70
                                                 60
a < 80                                           50
                          Cumulative frequency



                                                 40
                                                 30
                                                 20
                                                 10
                                                     0
                                                         0       5        10       15        20        25        30    35    40    45    50    55   60   65   70   75   80
                                                                                                                      Age of member




                                                 0           5       10       15        20        25        30        35    40    45    50    55    60   65   70   75   80
                                                                                                                  Age of member



How many members were older than 55?
What age are the oldest 20 members above?

Averages
2     8      7       4                           5                        6                   9                        7

Mean
Median
Mode
Range

Moving averages
                    Year 10 Module 1 exam revision
Calculating the mean from a frequency table

 Number of        Number of
 tests taken       people
     1                 9
     2                11
     3                 7
     4                 6
     5                 3
     6                 2
     7                 2
   Totals

Calculating the mean from a grouped frequency table




Probability




Stem and Leaf

Here is a set of data:
2.3     3.6     4.5    3.1    5.8   6.2   4.2   5.0   3.1
3.7     2.2     2.8    5.1    6.0   3.0   4.9   4.4   5.3

								
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