Looking for Information
Click on instructions button for directions on how to use the component and solve the given problems.
In your day-to-day life, you might have come across information, such as:
(a) Runs made by a batsman in the last 10 test matches.
(b) Number of wickets taken by a bowler in the last 10 ODIs.
(c) Marks scored by the students of your class in the Mathematics unit test.
(d) Number of story books read by each of your friends etc.
The information collected in all such cases is called data. Data is usually collected in the context of a situation that we want to study.
For example, a teacher may like to know the average height of students in her class. To find this, she will write the heights of all the students in her class, organise the data in a systematic manner and then interpret it accordingly.
Sometimes, data is represented graphically to give a clear idea of what it represents. Do you remember the different types of graphs which we have learnt in earlier classes? Let's recollect them first.
A Pictograph: Pictorial representation of data using symbols.
The following pictograph shows the number of absentees in a class of 30 students during the previous week :
| Days | Number of students | Absentee |
|---|---|---|
| Monday |  | |
| Tuesday | | |
| Wednesday | | |
| Thursday | ||
| Friday | | |
| Saturday | |
2. A bar graph: A display of information using bars of uniform width, their heights being proportional to the respective values.
Answer the questions using the graph shown above:
3. Double Bar Graph: A bar graph showing two sets of data simultaneously. It is useful for the comparison of the data.
The graph shown above shows the marks of two students: Ankita and Bhavan for the subject of "Maths" and "Science". Answer the following questions, using the above graph:
Try These
Draw an appropriate graph to represent the given information.
1
| Month | Number of watches sold |
|---|---|
| July | 1000 |
| August | 1500 |
| September | 1500 |
| October | 2000 |
| November | 2500 |
| December | 1500 |
2
| Children who prefer | School A | School B | School C |
|---|---|---|---|
| Walking | 40 | 55 | 15 |
| Cycling | 45 | 25 | 35 |
3
Percentage wins in ODI by 8 top cricket teams
| Teams | From Championship Trophy to World Cup '06 | Last 10 ODI in '07 |
|---|---|---|
| South Africa | 75 % | 78 % |
| Australia | 61 % | 40 % |
| Sri Lanka | 54 % | 38 % |
| New Zealand | 47 % | 50 % |
| England | 46 % | 50 % |
| Pakistan | 45 % | 44 % |
| West Indies | 44 % | 30 % |
| India | 43 % | 56 % |