The table shows information about the times for 100 people to complete a task.
Time, t,
(minutes)
0
5 < t < 10
10 < t < 15
15 < 1<20
Frequency
17
28
33
22
A) The shortest time was 2 minutes 50 seconds.
Work out the greatest possible range of times.
B) Jack says,
“The median time is exactly 10 minutes.”
Give a reason why he must be incorrect
[2 marks]
