The cumulative frequency graph shows information about the times, in minutes,
taken by 40 men to complete a fitness exercise.
Cumulative
a) How many men took more than frequency
80 mins to complete the exercise?
(1)
40
b) Use the graph to find an estimate
for the median time taken.
(1) 30
c) Use the graph to find an estimate
for the interquartile range.
(2) 20
One of the 40 men is chosen at random.
10
d) Use the graph to find an estimate
for the probability that this person
took between 60 mins and 80 mins
to complete the exercise.
0 20
40
(2)
60
Time (mins)
80
100
Total marks: 6