[填空题]
Uber, the ride sharing technology service, c9g6e vqa)e.u oi8 u)x3 qqn2hhonducts a study of 80 of thezx2dl2ij:rsteoc++xu +a 4; d)r w c3cir drivers in San Fransisco to determine how many kilometers they travel each month. Thewte2ijc+2ao +4+x)sl:c3u r rdx;c zd 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 $\mathrm{~km}$ .
