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Question (1)

QN0030718

Which of the following best describes a representative value of a data set?

(A) The largest value in the data
(B) A value that represents the entire data set reasonably well
(C) The first value in the data
(D) The smallest value in the data

Correct Answer: B

Explanation:

A representative value summarizes the entire data set using a single value.

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Question (2)

QN0030719

Which representative value is obtained by adding all observations and dividing by the number of observations?

(A) Mode
(B) Median
(C) Mean
(D) Range

Correct Answer: C

Explanation:

Mean = Sum of all observations ÷ Number of observations.

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Question (3)

QN0030720

Which of the following is NOT a representative value used to describe a data set in this chapter?

(A) Mean
(B) Median
(C) Range
(D) Both mean and median

Correct Answer: C

Explanation:

Range measures spread, not a representative value.

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Question (4)

QN0030721

The mean of 8, 12, 15 and 5 is

(A) 8
(B) 9
(C) 10
(D) 11

Correct Answer: C

Explanation:

Mean = (8 + 12 + 15 + 5) ÷ 4 = 40 ÷ 4 = 10.

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Question (5)

QN0030722

Find the mean of 14, 18, 20, 16 and 12.

(A) 15
(B) 16
(C) 17
(D) 18

Correct Answer: B

Explanation:

Mean = (14 + 18 + 20 + 16 + 12) ÷ 5 = 80 ÷ 5 = 16.

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Question (6)

QN0030723

The mean of six numbers is 24. What is their total?

(A) 120
(B) 124
(C) 144
(D) 150

Correct Answer: C

Explanation:

Total = Mean × Number of observations = 24 × 6 = 144.

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Question (7)

QN0030724

The total marks scored by 5 students are 425. What is their mean score?

(A) 80
(B) 82
(C) 85
(D) 90

Correct Answer: C

Explanation:

Mean = 425 ÷ 5 = 85.

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Question (8)

QN0030725

The mean of 11, 13, 15, 17 and x is 16. Find x.

(A) 20
(B) 22
(C) 24
(D) 26

Correct Answer: C

Explanation:

Total = 16 × 5 = 80. Sum of known numbers = 56. Therefore, x = 24.

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Question (9)

QN0030726

Which statement about the mean is correct?

(A) It is always one of the observations.
(B) It is obtained by arranging data in order.
(C) It uses every observation in the data set.
(D) It is always the greatest observation.

Correct Answer: C

Explanation:

Mean is calculated using all observations.

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Question (10)

QN0030727

The average age of 10 children is 11 years. What is the sum of their ages?

(A) 100 years
(B) 110 years
(C) 111 years
(D) 120 years

Correct Answer: B

Explanation:

Total age = 11 × 10 = 110 years.

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Question (1)

Which of the following best describes a representative value of a data set?

Explanation:

Link:

Question (2)

Which representative value is obtained by adding all observations and dividing by the number of observations?

Explanation:

Link:

Question (3)

Which of the following is NOT a representative value used to describe a data set in this chapter?

Explanation:

Link:

Question (4)

The mean of 8, 12, 15 and 5 is

Explanation:

Link:

Question (5)

Find the mean of 14, 18, 20, 16 and 12.

Explanation:

Link:

Question (6)

The mean of six numbers is 24. What is their total?

Explanation:

Link:

Question (7)

The total marks scored by 5 students are 425. What is their mean score?

Explanation:

Link:

Question (8)

The mean of 11, 13, 15, 17 and x is 16. Find x.

Explanation:

Link:

Question (9)

Which statement about the mean is correct?

Explanation:

Link:

Question (10)

The average age of 10 children is 11 years. What is the sum of their ages?

Explanation:

Link:

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