Data Handling Class 7 Worksheet

Data Handling Class 7 Worksheets play a vital role in strengthening the maths concepts.

Data Handling Class 7 Worksheet 1 with Answers

1. Choose the correct answer in each of the following.

a. The graphical representation of data using a circle is called a

i. bar graph

ii. pie chart

iii. line graph

iv. pictograph

b. The arrangement of numerical data in ascending or descending order is called

i. line graph

ii. frequency

iii. arranged data

iv. none of these

2. Fill in the blanks to make the statements true.

a. The average of a set of numbers is termed as ___________.

b. Data graphically represented using pictures is known as the ___________.

c. Data graphically represented using bars is known as the ___________.

d. Bars are of the same ___________ and the distance between any two successive bars is the ___________.

3. Arrange each of the following data as an array and find the range.

a. 35, 18, 38, 74, 43, 12, 8, 70, 63, 72, 57

b. 18, 125, 16, 3, 92, 36, 45, 113, 78, 52, 45, 58, 46, 28, 108

4. Arrange each of the following data as an array and find the mean.

a. 43, 15, 18, 24, 23, 19, 28, 23, 21, 49, 23, 44, 28, 18, 32

b. 42, 46, 38, 44, 32, 53, 38, 40, 56, 48, 49, 36

5. Make a frequency table for the following data and hence calculate the mean:

4, 6, 5, 1, 3, 4, 2, 3, 3, 2, 1, 6, 4, 5, 5, 1, 1, 3, 2, 5, 2, 5, 3, 3, 4, 1, 4, 3, 3, 2

6. The sales of XYZ store during the first six months are given below.

Months	January	February	March	April	May	June
Sales (in lakhs Rs)	7	6	5	7	8	4

Represent the data using

a. a bar graph

b. a line graph

7. The following table shows the monthly expenses of a family.

Item	Food	Clothing	Rent	Education	Miscellaneous	Savings	Total
Expenses (in Rs)	9000	5000	6000	5000	1000	4000	30000

Draw a pie chart to represent the given data.

8. The following table shows the central angle of a pie chart. Taking total number of students as 100, fill in the table as shown representing the percentage of students obtaining the various grades.

Result	Centrals angels	Percentage of students
Grade A	90°	90°/360° × 100 =
Grade B	180°
Grade C	60°
Grade D	30°
Total	360°	100 %

Data Handling Class 7 Worksheet 2 with Answers

1. Choose the correct answer in each of the following.

a. The collection of information in the form of numerical figures is called

i. data

ii. array

iii. observation

iv. pie

b. The difference between the highest and the lowest value of observations in a data is called the

i. frequency

ii. range

iii. data

iv. mean

c. The number of times a particular observation occurs in a set of data is called the

i. range

ii. class interval

iii. frequency

iv. data

2. Fill in the blanks to make the statements true.

a. A graph drawn by plotting points and joining the points by means of a straight line is known as the ___________ graph.

b. The mean of scores 6, 12, 15, 14, 12, 8, 3, 4, 7, 8 obtained by 10 students in a particular test is ___________.

3. Arrange the following marks obtained by 10 students in a test in ascending order and find their mean: 50, 68, 54, 48, 72, 56, 60, 74, 53, 43

4. Draw a bar graph for the following data representing the daily wages of 60 workers.

Wages (per day)	70	80	90	100	110	120
Numbers of workers	6	9	8	15	10	12

5. The following data shows the various newspapers bought by a certain group of people.

Newspaper	A	B	C	D	E
Numbers of people	40	60	120	100	80

Represent this data using a pie chart.

6. The following data shows the consumption of electricity by a family in six consecutive months. Represent the data by using a line graph.

Months	Jan	Feb	Mar	Apr	May	June
Numbers of units consumed	160	200	220	320	380	420

7. The average temperature of six consecutive weeks of a city is given below.

Weeks	1	2	3	4	5	6
Temperature (in °C)	23	25	26	24	22	23

Represent the above data by

a. a line graph

b. a bar graph

8. Find the range and the mean for the following data:

18, 45, 12, 18, 20, 15, 25, 38, 40, 15, 48, 20, 12, 34, 24

9. The following data shows the number of members staying in each flat of a housing complex consisting of 40 flats.

3 2 5 1 2 5 4 1 2 4

4 3 5 4 4 4 5 2 4 2

3 2 2 3 2 3 2 6 3 4

6 4 4 4 4 2 4 5 6 3

Make a frequency distribution table using tally marks and represent the data using a bar graph. Also, calculate the mean.

10. Using the given bar graph, form a frequency distribution table showing the various books kept in a particular school library.

Answer the following questions.

a. The books of which subject are maximum in number?

b. The books of which subject are minimum in number?

c. How many English books are there?

d. How many Hindi books are there?

ANSWERS

Worksheet 1

1. a. ii b. iii

2. a. mean b. pictograph

c. bar graph

d. width; same

3. a. 8, 12, 18, 35, 38, 43, 57, 63, 70, 72, 74

Range = 66

b. 3, 16, 18, 28, 36, 45, 45, 46, 52, 58, 78, 92, 108, 113, 125

Range = 122

4. a. 15, 18, 18, 19, 21, 23, 23, 23, 24, 28, 28, 32, 43, 44, 49

Mean = 27.2

b. 32, 36, 38, 38, 40, 42, 44, 46, 48, 49, 53, 56

Mean = 43.5

5. Mean = 3.2

6. Do it yourself

7. Do it yourself

Result	Centrals angels	Percentage of students
Grade A	90°	90°/360° × 100 = 25%
Grade B	180°	180°/360° × 100 = 50
Grade C	60°	60°/360° × 100 = 16.67%
Grade D	30°	30°/360° × 100 = 8.33%
Total	360°	100 %