This box-and-whisker diagram shows the times taken by $100$ people to complete a simple word puzzle. Construct a cumulative frequency curve for the data.

The cumulative frequency curve here shows the speeds (in kilometres per hour) of some cars on motorway $A$.

Find an estimate for the median speed.(Answer without units)

The cumulative frequency curve here shows the speeds (in kilometres per hour) of some cars on motorway $A$.

The speed limit on the motorway is $130 \mathrm{km}/\mathrm{h}$.
Find an estimate for the percentage of cars exceeding the speed limit.

The cumulative frequency curve here shows the speeds (in kilometres per hour) of some cars on motorway $A$.

Construct a box-and-whisker diagram for the speed data for motorway $A$.
The box-and-whisker diagram below shows the speeds of some cars on motorway $B$

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The box-and-whisker diagram below shows the speeds of some cars on motorway $A$.

The box-and-whisker diagram below shows the speeds of some cars on motorway $B$.

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Compare the speeds of the cars on motorway $A$ and motorway $B$.

State whether this class interval represent continuous or discrete data, and give reasons for your answer.

$\begin{array}{l}10<x\le 20\\ 20<x\le 30\end{array}$

State whether this class interval represent continuous or discrete data, and give reasons for your answer.

$\begin{array}{l}14\le x\le 18\\ 19\le x\le 23\end{array}$

State whether this class interval represent continuous or discrete data, and give reasons for your answer.

$\begin{array}{l}6<x\le 9\\ 9<x\le 12\end{array}$

State whether this class interval represent continuous or discrete data, and give reasons for your answer.

$\begin{array}{l}20-39\\ 40-64\end{array}$