Statistics Test

Result

Statistics Test - 3

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Weekly Quiz Competition

Question 1

1 / -0

Directions For Questions

Answer the question based on the given table.

Age Group	Frequency	Cumulative Frequency
3 – 5	2
5 – 7	4
7 – 9	3
9 – 11	1	X
11 – 13	2	Y
13 – 15	6

...view full instructions

What is the class size of each age group?

4

8

1

2 Solution

The class size of each group = (upper limit – lower limit) of any group
= 5 – 3 = 2

Question 2

1 / -0

Directions For Questions

Answer the question based on the given table.

Age group	Frequency	Cumulative frequency
3 – 5	2
5 – 7	4
7 – 9	3
9 – 11	1	X
11 – 13	2	Y
13 – 15	6

...view full instructions

Which of the following options will be the value of Y?

10

8

12

3 Solution

Y = Cumulative frequency of age group 11 – 13
= 2 + 4 + 3 + 1 + 2
= 12
[∵ Cumulative frequency of a class interval is obtained by adding all the frequencies upto that class interval]

Question 3

1 / -0

Directions For Questions

Answer the question based on the table below.

Class Interval	Cumulative Frequency
1 – 15	6
15 – 30	10
30 – 45	–
45 – 60	24
60 – 75	–
75 – 90	39
90 – 105	43

...view full instructions

If the frequency for class interval 45 – 60 is 8, then what is the frequency for class interval 30 – 45?

8

4

6

18 Solution

Let the frequency of interval (30 – 45) be x.
The cumulative frequency of class interval 45 – 60 is 24, but if it is 8, then
10 + x + 8 = 24
⇒ x + 18 = 24
⇒ x = 24 – 18 = 6

Question 4

1 / -0

Directions For Questions

Answer the question based on the table below.

Class Interval	Cumulative Frequency
1 – 15	6
15 – 30	10
30 – 45	–
45 – 60	24
60 – 75	–
75 – 90	39
90 – 105	43

...view full instructions

If frequencies for class–intervals 45 – 60 and 75 – 90 are 8 and 5 respectively, what is the frequency for class–interval 60 – 75?

20

15

13

10 Solution

Let the frequency of class interval (60 – 75) be x.
Cumulative frequency of class interval 75 – 90 = 39
⇒ 24 + x + 5 = 39
⇒ 29 + x = 39
⇒ x = 39 – 29
⇒ x = 10

Question 5
1 / -0

Directions For Questions

The age of 15 children of an area is as follows.

15 12 10 16 17 15 14 8
10 16 17 15 14 16 9

...view full instructions

What is the frequency of 14 years old children?

A
1

B
2

C
7

D
9

Solution

Frequency of 14 years old children means the number of times the number 14 occurs in the given data.
∴ Required frequency = 2
Question 6
1 / -0

Directions For Questions

The age of 15 children of an area is as follows:
15 12 10 16 17 15 14 8
10 16 17 15 14 16 9

...view full instructions

How many chidren are of highest age?

A
5

B
2

C
3

D
17

Solution

The oldest children are of age 17 years, and number 17 occurs only twice in the given data. Therefore, frequency of the oldest children is 2.
Question 7
1 / -0

Directions For Questions

The age of 15 children of an area is as follows:
15 12 10 16 17 15 14 8
10 16 17 15 14 16 9

...view full instructions

How many children are of least age?

A
8

B
3

C
2

D
1

Solution

The youngest child is of age 8 years, and the number 8 occurs only once in the given data. Therefore, frequency of the youngest child is 1.
Question 8
1 / -0

Directions For Questions

The age of 15 children of an area is as follows:
15 12 10 16 17 15 14 8
10 16 17 15 14 16 9

...view full instructions

What is the range of age of these 15 children?

A
4.5

B
25.0

C
12.5

D
9.0

Solution

Range of age of 15 children = Highest age - lowest age = 17 - 8 = 9
Question 9
1 / -0

Directions For Questions

The age of 15 children of an area is as follows:
15 12 10 16 17 15 14 8
10 16 17 15 14 16 9

...view full instructions

What is the frequency of 16 years old children?

A
4

B
2

C
3

D
1

Solution

The frequency of 16 years old children is 3 as the number 16 occurs thrice in the given data.

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Re-Attempt Weekly Quiz Competition

Statistics Test - 3

Result

Statistics Test - 3

Score

-

Rank

-

SHARING IS CARING

Question 1

4

8

1

2

Solution

Question 2

10

8

12

3

Solution

Question 3

8

4

6

18

Solution

Question 4

20

15

13

10

Solution

Question 5

1

2

7

9

Solution

Question 6

5

2

3

17

Solution

Question 7

8

3

2

1

Solution

Question 8

4.5

25.0

12.5

9.0

Solution

Question 9

4

2

3

1

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

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