Stage 9 - Q8 - 5 marks
20234
Compare the two estimated mean times to 1 decimal place using matching class midpoints.
Time (min)
A
B
\(5\le t<10\)
8
6
\(10\le t<15\)
15
9
\(15\le t<20\)
13
13
\(20\le t<25\)
9
15
\(25\le t<30\)
6
8
Hint
Use the same midpoints but different frequencies.