a) Work out estimates for the median
and the interquartile range of the
times for
i) brand A.
ii) brand B.
b) Give two comparisons between the
brands of headphones.
Frequency density
201
16-
12-
8-
Brand A
0
1
2 3 4 5 6
7 8
Time (hours)
0
H
Brand B
2
3
4
Time (hours)
