B The heights in centimetres of 30 different plants were measured 6 weeks after
planting. This grouped frequency diagram shows the results.
14-
12
10
8
Frequency
6-
4
2
0
0
5
10 15 20 25 30
Height (cm)
Complete the table below for this grouped frequency diagram.
Height (cm)
Frequency
5 8
15 20 с
Using the frequency diagrams from parts a and b, do you think these two
samples are the same species of plant? Give a reason for your answer.