[填空题]
Uber, the ride sharing technologylfo1n)lo5fzr -e4 up/ ser h( hz.qhp5tfah y.p.(fq: 2fo/)g9rnt yht* rvice, conducts a study of 80 of their drivers in San Fransisco to determine how many kilometerq o9.h.qnzgh:r)y 5/tpah*(h(r.2phy tfff ts they travel each month. The distance each driver travelled in April is recorded. The cumulative frequency curve for this data is shown below.
1. Find the number of drivers that travelled a distance between 3200 and 5000 kilometres.
2. Use the cumulative frequency curve to find the
(1) median distance; km
(2) lower quartile; km
(3) upper quartile. km
3. Hence, find the interquartile range.
4. Write down the percentage of drivers that travelled a distance greater than the upper quartile.
5. Find the number of drivers that travelled a distance less than or equal to 2750 $\mathrm{~km}$ .
t is known that 11 drivers travelled more than m kilometres. %
6. Find the value of m .
The smallest distance travelled by one of the drivers was 500 $\mathrm{~km} $. The longest distance travelled by one of the drivers was 6000 $\mathrm{~km} $.
7. On graph paper, draw a box-and-whisker diagram for these data. Use a scale of $2 \mathrm{~cm$} to represent 1000 $\mathrm{~km}$ .
