8/16 Marks
The incomplete table and histogram give information about the waiting time,
in minutes, experienced by patients at a dental surgery.
Frequency
Time (t minutes)
0 < t < 30
30 < t < 40
40 < t < 60
60 < t < 80
80 < t < 100
35
20
10
Frequency density
a) Use the histogram to complete
the table.
b) Use the table to complete
the histogram.
20
40
60
Time (t minutes)
100