Stage 9 - Q5 - 4 marks
20171
The two polygons have frequencies B exactly twice A in every class. Does the taller B polygon prove larger typical values? Explain.
Frequency
20
30
40
50
60
70
0
5
10
15
20
25
30
Time (min)
A
B
Hint
Compare proportions, not raw counts, when sample sizes differ.