Table of contents  
Introduction  
Recording Data  
Organization of Data  
Pictograph  
Bar Graph 
Data refers to information or facts that are collected and used for various purposes. Handling data involves managing, organizing, analyzing, and making sense of this information.
(i) Frequency tells the number of times the particular observation happened.
(ii) Tally marks are used to show the frequency of the data. They are represented as:
Example: There are 30 students in a class. They have to choose one sport each for the sports period.
5 took badminton,
10 took cricket,
4 took football,
1 took hockey,
3 took tennis, and
7 went for volleyball.
Represent this data in the frequency distribution table.
Sol: To make a frequency distribution table
We can easily answer the questions like who has a maximum number of toys, who has the least number of toys etc.
Example: The number of cars parked in a parking lot every day is given in the pictograph.
(i) Find the day when the highest number of cars are parked and how many?
(ii) When the least number of cars did park?
Sol: In the above pictograph one car represent 5 cars.
(i) As there is the maximum number of cars is shown on Tuesday so the highest number of cars was parked on Tuesday.
Hence, 40 cars were parked on Tuesday in the parking lot.
(ii) Least number of cars were parked on Monday as there are only 4 pictures of cars are shown on that day.
Example: The following table shows the choice of the fruits of the 35 students of class 3. Represent the data in a pictograph.
Sol:
(i) Which colour is liked by the maximum number of students?
(ii) Which colour is liked by the same number of students?
Sol: (i) The graph shows that the pink colour is liked by 9 students so it is the favourite colour of the maximum number of students.
(ii) Blue and green colour bars are equal in length and both are liked by 6 students.
Example: The daily sale of mobile phones in Vicky production is given below. Draw the bar graph to represent the data.
Sol: Steps to make a bar graph
Practice Question: The given data shows the number of goals scored by a player in 24 different football matches. Study the data carefully and answer the following question.
2, 3, 2, 1, 0, 4, 3, 1, 2, 0, 3, 2, 1, 3, 0, 2, 5, 2, 4, 3,1, 2, 1, 3
How many times the player scored at least 2 goals?
Sol: Here, we've to calculate the number of times the player has scored at least 2 goals.
Al least 2 implies greater than or equal to 2.
So, total no. of times the player has scored at least 2 goals is 16 times(2, 3, 2, 4, 3, 2, 3, 2, 3, 2, 5, 2, 4, 3, 2, 3).
9 videos114 docs49 tests

1. What is the importance of recording data in data handling? 
2. How can data be organized effectively in data handling? 
3. What is a pictograph and how is it used in data handling? 
4. How is a bar graph different from a pictograph in data handling? 
5. Why is it important to use both pictographs and bar graphs in data handling? 

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