The times taken by 20 students to complete a worksheet are shown.
Time, t minutes
Frequency
0 4
5 10 < t ≤ 15
15 < t ≤ 20
673
Draw a frequency diagram
for the data.
Frequency
8-
7
6-
3
2
1
0
0
5
10 15
Time, t (minutes)
20