Exercise 5.1

html_content = """

Chapter 5: Statistics

Exercise 5.1 Solutions

1. Fill in the blanks.

Solution:

• (i) The collected information is called Data.
• (ii) An example of a Primary Data is Attendance list of students collected by a teacher in a class (or any direct headcount/survey).
• (iii) An example of a Secondary Data is Cricket match scores obtained from a website/television (or data gathered from a pre-published source).
• (iv) The tally marks for number 8 in standard form is |||| ||| (A bundle of 5 followed by 3 vertical lines).

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.

Solution:

Number on Die	Tally Marks	Frequency (No. of times)
1	||||	4
2	||	2
3	||	2
4	||||	5
5	|||| |||	8
6	|||| ||	9
Total	-	30

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

Solution:

Colours	Tally Marks	Frequency (No. of students)
Red	||||	4
Blue	|||| ||	7
White	||	2
Grey	|||| ||	7
Green	||||	5
Total	-	25

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

Solution:

Marks	Tally Marks	Frequency (No. of students)
11	||	2
12	||||	5
13	||||	4
14	||||	4
15	|||| ||	7
16	||||	4
17	||	2
18	|	1
19	|	1
20	|	1
Total	-	30

5. The table shows the number of calls recorded by a Fire Service Station in one year. Complete the table and answer the following questions.

Solution:

Completed Table:

Types of Calls	Tally Marks	Frequency
Building Fires	|||| ||	7
Other Fires	|||| |||| |	11
Hazardous Materials	|||| ||	7
Rescues	||||	4
False Alarms	|||| ||	7
Total	-	36

Answers to sub-questions:

• (i) Which type of call was recorded the most?
  Answer: Other Fires (11 calls).
• (ii) Which type of call was recorded the least?
  Answer: Rescues (4 calls).
• (iii) How many calls were recorded in all?
  Answer: 36 calls ($7 + 11 + 7 + 4 + 7 = 36$).
• (iv) How many calls were recorded as False Alarms?
  Answer: 7 calls.