Stage 9 - Q2 - 4 marks
20158
Draw a frequency polygon for the table. Use class midpoints and label both axes.
Time (min)
Frequency
\(15\le t<20\)
6
\(20\le t<25\)
7
\(25\le t<30\)
16
\(30\le t<35\)
8
\(35\le t<40\)
4
Hint
Find the middle of each interval before plotting.