Name: Mean of Ungrouped data: Example
Uploaded: 2019-07-19
Duration: 2 min 7 s
Description: Familiarise yourself with the calculation of the arithmetic means of the values collected in the data. This example involves marks scored by students.

Question

The height of some tall structures in the world is given as follows.

Structure	Country	Height in Metres
Empire State Building	USA	$449$
Delhi TV Tower	India	$234$
Telecom Tower	Great Britain	$204$
Eiffel Tower	France	$321$

Represent the above data by drawing a bar graph with appropriate scale.

Accepted Answer

Given,

The height of some tall structures in the world is given as follows.

Structure Country Height in Metres

Empire State Building USA $449$

Delhi TV Tower India $234$

Telecom Tower Great Britain $204$

Eiffel Tower France $321$

To draw a bar graph first we need to choose the scale such that the maximum value $449$ and the minimum value $204$ are included. So, all bar lie between $0$ and $500$ .

We can draw the bar graph by following the given steps:

Step 1.- On a graph paper, draw a horizontal line OX as x-axis and vertical line OY as y-axis.

Step 2.- Along OX, write the name of the structure and city at the points that are taken at a uniform gap.

Step 3.- Choose the scale:
1 unit = $100$ Metres
Step 4.- To draw this bar graph we will take the approximate value of all the heights so that we can easily show them on graph. For example: $449 \approx 500$ , $234 \approx 230$ , $204 \approx 200$ , $321 \approx 320$

Draw bars of equal width on the x-axis. The difference between the two bars should also be the same.
We get the following bar graph:

Month	Jan	Feb	Mar	Apr	May	June	July	Aug	Sept	Oct	Nov	Dec
Fiction	$750$	$800$	$600$	$800$	$750$	$790$	$680$	$590$	$630$	$570$	$750$	$560$
Non-fiction	$720$	$650$	$750$	$530$	$700$	$660$	$790$	$710$	$460$	$720$	$720$	$490$

Students	Ramu	Manjit	Venkat	Shehzad	Manisha	Aarthi
Marks obtained	$540$	$430$	$410$	$370$	$460$	$530$

Favourite fruit	Apple	Banana	Mango	Grapes	Orange
Number of students	$19$	$14$	$35$	$18$	$14$

The height of some tall structures in the world is given as follows.

Structure Country Height in Metres

Empire State Building USA $449$

Delhi TV Tower India $234$

Telecom Tower Great Britain $204$

Eiffel Tower France $321$

Represent the above data by drawing a bar graph with appropriate scale.

Important Questions on Data Handling and Probability

Learn and Prepare for any exam you want !

The height of some tall structures in the world is given as follows. Structure Country Height in Metres Empire State Building USA 449 Delhi TV Tower India 234 Telecom Tower Great Britain 204 Eiffel Tower France 321 Represent the above data by drawing a bar graph with appropriate scale.

Important Questions on Data Handling and Probability

Learn and Prepare for any exam you want !