Exercise 5.1

Exercise 5.1

1. Fill in the blanks.

(i) The collected information is called data.

(ii) An example of a Primary Data is List of absentees in a class.

(iii) An example of a Secondary Data is cricket scores gathered from a website.

(iv) The tally marks for number 7 in standard form is | | .

2. Viji threw a die 30 times and noted down the result each time as follows. Prepare a table on the numbers shown using Tally Marks.

1 4 3 5 54 6 6 4 3 5 4 5 6 5 2

4 2 6 5 54 6 6 4 5 6 6 5 4 1 1

Solution:

3. The following list tells colours liked by 25 students. Prepare a table using Tally Marks.

Red Blue White Grey White

Green Grey Blue Green Grey

Blue Grey Red Green Red

Blue Blue Green Blue Green

Grey Grey Green Grey Red

Solution:

4. The following are the marks obtained by 30 students in a class test out of 20 in Mathematics subject.

11 12 13 12 12 15 16 17 18 12

20 13 13 14 14 14 15 15 15 15

16 16 16 15 14 13 12 11 19 17

Prepare a table using Tally Marks.

Solution:

5. The table shows the number of calls recorded by a Fire Service Station in one year.

Solution:

Complete the table and answer the following questions.

(i) Which type of call was recorded the most?

Answer: Other fires

(ii) Which type of call was recorded the least?

Answer: Rescues

(iii) How many calls were recorded in all?

Answer: 35

(iv) How many calls were recorded as False Alarms?

Answer: 7 .

Objective Type Questions

6. The tally marks for the number 7 in standard form is __________.

(a) 7

(b) | | 

(c) ✔✔✔✔✔✔✔

(d) 

Answer: (b)

7. The tally marks | | | | PPPPPPPPP represents the number count

(a) 5

(b) 8

(c) 9

(d) 10

Answer: (c) 9

8. The plural form of ‘datum’ is

(a) datum

(b) datums

(c) data

(d) datas

Answer: (c) data

Answers:

Exercise 5.1

1) (i) Data (ii) List of absentees in a class (iii) Cricket scores gathered from a website (iv) | | 

2) 

3) 

4) 

5) 

(i) other fires (ii) rescues (iii) 35 (iv) 7

6) (b) ||  

7) (c) 9

8) (c) data