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Question (11)

QN0020062

A data set has mean 35. A new value 25 is included. The new mean will:

(A) increase
(B) decrease
(C) remain same
(D) become 25

Correct Answer: B

Explanation:

Adding a value less than the mean decreases the mean.

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Question (12)

QN0020063

A value equal to the mean is added to a data set. The mean will:

(A) increase
(B) decrease
(C) remain unchanged
(D) become zero

Correct Answer: C

Explanation:

Adding the mean itself does not change the mean.

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Question (13)

QN0020064

The mean of a data set is 18. Which pair can be added without changing the mean?

(A) 12 and 24
(B) 15 and 21
(C) 10 and 26
(D) All of these

Correct Answer: D

Explanation:

Each pair has average 18.

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Question (14)

QN0020065

The mean of 8, 3, 10, 13, 4, 6, 7, 7, 8, 8, 5 is:

(A) 6
(B) 7
(C) 8
(D) 9

Correct Answer: B

Explanation:

Sum = 79, Mean = 79 ÷ 11 ≈ 7.18 ≈ 7.

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Question (15)

QN0020066

If 10 is added to every value of a data set whose mean is 24, the new mean becomes:

(A) 14
(B) 24
(C) 34
(D) 240

Correct Answer: C

Explanation:

New mean = 24 + 10 = 34.

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Question (16)

QN0020067

If 3 is subtracted from every value of a data set whose mean is 19, the new mean is:

(A) 16
(B) 19
(C) 22
(D) 57

Correct Answer: A

Explanation:

New mean = 19 − 3 = 16.

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Question (17)

QN0020068

If every value of a data set is doubled and the original mean is 12, the new mean is:

(A) 12
(B) 14
(C) 24
(D) 48

Correct Answer: C

Explanation:

Doubling all values doubles the mean.

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Question (18)

QN0020069

If every value is multiplied by 5 and the original mean is 8, the new mean is:

(A) 13
(B) 25
(C) 40
(D) 80

Correct Answer: C

Explanation:

8 × 5 = 40.

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Question (19)

QN0020070

The median of 2, 5, 8, 11, 14 is:

(A) 5
(B) 8
(C) 11
(D) 14

Correct Answer: B

Explanation:

The middle value is 8.

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Question (20)

QN0020071

The median of 4, 7, 9, 12 is:

(A) 7
(B) 8
(C) 8.5
(D) 9

Correct Answer: C

Explanation:

(7 + 9) ÷ 2 = 8.5.

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Question (11)

A data set has mean 35. A new value 25 is included. The new mean will:

Explanation:

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Question (12)

A value equal to the mean is added to a data set. The mean will:

Explanation:

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Question (13)

The mean of a data set is 18. Which pair can be added without changing the mean?

Explanation:

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Question (14)

The mean of 8, 3, 10, 13, 4, 6, 7, 7, 8, 8, 5 is:

Explanation:

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Question (15)

If 10 is added to every value of a data set whose mean is 24, the new mean becomes:

Explanation:

Link:

Question (16)

If 3 is subtracted from every value of a data set whose mean is 19, the new mean is:

Explanation:

Link:

Question (17)

If every value of a data set is doubled and the original mean is 12, the new mean is:

Explanation:

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Question (18)

If every value is multiplied by 5 and the original mean is 8, the new mean is:

Explanation:

Link:

Question (19)

The median of 2, 5, 8, 11, 14 is:

Explanation:

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Question (20)

The median of 4, 7, 9, 12 is:

Explanation:

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