Stage 9 - Q8 - 4 marks
20164
The table contains 31 observations. Find the missing frequency, then draw its frequency polygon.
Time (min)
Frequency
\(10\le t<15\)
3
\(15\le t<20\)
8
\(20\le t<25\)
?
\(25\le t<30\)
7
\(30\le t<35\)
1
Hint
The frequencies must add to the stated number of observations.