Representation of Continuous Data

A _____ is a zig-zag line that is usually drawn in the $x$ axis when the scale on the axis does not start from zero.

In histogram, the _____ of each bar represents the value whereas in bar chart the _____ of each bar represents the values that they represent.

Pie graph is used to represent data in continuous elements.

Which graph is used to represent data in continuous elements?

A railway line monitored $15\%$ of its August train journeys to find their departure delay times. The results are shown below. It is given that $24$ of these journeys were delayed by less than $2$ minutes.

Find the total number of journeys provided in August.

A railway line monitored $15\%$ of its August train journeys to find their departure delay times. The results are shown below. It is given that $24$ of these journeys were delayed by less than $2$ minutes.

Calculate an estimate of the number of these journeys that were delayed by:
$10$ to $15$ minutes.

The masses, $m$ grams, of $690$ medical samples are given in the following table.

A shopkeeper takes $12$ bags of coins to the bank. The bags contain the following numbers of coins:
$150, 163, 158, 165, 172, 152, 160, 170, 156, 162, 159$ and $175$
Each bag contains coins of the same value, and the shopkeeper has at least one bag containing coins with dollar values of $0.10, 0.25, 0.50$ and $1.00$ only.
What is the greatest possible value of all the coins in the $12$ bags?

The weights of $121$ sausages are summarised in the following table.

State how many sausages weighed between $45 \mathrm{g}$ and $50 \mathrm{g}$.

The weights of $230$ sausages are summarised in the following table.

State how many sausages weighed between $20 \mathrm{g}$ and $30 \mathrm{g}$.

The weights of $230$ sausages are summarised in the following table.

State how many sausages weighed between $60 \mathrm{g}$ and $70 \mathrm{g}$.

The weights of $230$ sausages are summarised in the following table.

State how many sausages weighed between $60 \mathrm{g}$ and $70 \mathrm{g}$.

The weights of $220$ sausages are summarised in the following table.

State how many sausages weighed between $20 \mathrm{g}$ and $30 \mathrm{g}$.

The weights of $220$ sausages are summarised in the following table.

State how many sausages weighed between $60 \mathrm{g}$ and $70 \mathrm{g}$.

The weights of $220$ sausages are summarised in the following table.

State how many sausages weighed between $50 \mathrm{g}$ and $60 \mathrm{g}$.

In a particular city there are $67$ buildings of historical interest. The following table presents the ages of these buildings, given to the nearest $50$ years.

The densities, $dg/{\mathrm{cm}}^3$, of $107$ chemical compounds are given in the following table.

Find the frequencies $a, b, c$ and $d$ 

The densities, $dg/{\mathrm{cm}}^3$, of $107$ chemical compounds are given in the following table.

Find the frequencies $a, b, c$ and $d$ 

The densities, $dg/{\mathrm{cm}}^3$, of $105$ chemical compounds are given in the following table.

Find the frequencies $a, b, c$ and $d$ 

The densities, $dg/{\mathrm{cm}}^3$, of $129$ chemical compounds are given in the following table.

Find the frequencies $a, b, c$ and $d$ given in the table below.