Cumulative frequency

1
Cumulative frequency

• Constructing a cumulative frequency table
• Using a cumulative frequency graph to construct a
  box and whisker diagram

2
A golf club has 200 members. Their ages are shown
in the frequency table below.
A cumulative frequency (or a less than) table
can be drawn from this data.
8
8
26
34
32
66
45
111
37
148
29
177
16
193
7
200
How old is the youngest/oldest person?
3
We can now use this to draw a cumulative
frequency graph.
8
8
10
34
20
34
66
30
66
111
40
111
50
148
148
60
177
177
70
193
193
80
200
200
4
We can now use this to draw a cumulative
frequency graph.
8
34
66
111
148
177
193
200
5
Cumulative Frequency graph.
We can now use this to find the following
information..
Median
37
Lower quartile
25
Upper quartile
51
Lowest Value
0
Highest Value
80
Interquartile range
51 - 25
26
This information can now be used to draw a box
and whisker diagram..