Statistics & Probability for Competitive Exam Success

Q. What is the coefficient of variation if the mean is 50 and the standard deviation is 5?

A. 5%
B. 10%
C. 15%
D. 20%

Solution

Coefficient of Variation = (Standard Deviation / Mean) * 100 = (5 / 50) * 100 = 10%.

Correct Answer: B — 10%

Learn More →

Q. What is the coefficient of variation if the mean is 50 and the standard deviation is 10?

A. 20%
B. 10%
C. 15%
D. 25%

Solution

Coefficient of variation = (Standard deviation / Mean) * 100 = (10 / 50) * 100 = 20%.

Correct Answer: A — 20%

Learn More →

Q. What is the interquartile range (IQR) of the data set {1, 3, 5, 7, 9, 11, 13, 15}?

A. 4
B. 6
C. 8
D. 10

Solution

Q1 = 4, Q3 = 10. IQR = Q3 - Q1 = 10 - 4 = 6.

Correct Answer: B — 6

Learn More →

Q. What is the interquartile range (IQR) of the data set {1, 3, 7, 8, 9, 10}?

A. 5
B. 6
C. 4
D. 3

Solution

IQR = Q3 - Q1; Q1 = 3, Q3 = 8; IQR = 8 - 3 = 5.

Correct Answer: A — 5

Learn More →

Q. What is the interquartile range (IQR) of the data set {1, 3, 7, 8, 9}?

A. 6
B. 5
C. 4
D. 3

Solution

Q1 = 3, Q3 = 8. IQR = Q3 - Q1 = 8 - 3 = 5.

Correct Answer: A — 6

Learn More →

Q. What is the interquartile range (IQR) of the data set: 1, 2, 3, 4, 5, 6, 7, 8, 9?

A. 4
B. 5
C. 6
D. 3

Solution

Q1 = 3, Q3 = 7; IQR = Q3 - Q1 = 7 - 3 = 4.

Correct Answer: A — 4

Learn More →

Q. What is the interquartile range (IQR) of the data set: 1, 3, 5, 7, 9, 11, 13?

A. 4
B. 6
C. 8
D. 10

Solution

Q1 = 3, Q3 = 9. IQR = Q3 - Q1 = 9 - 3 = 6.

Correct Answer: B — 6

Learn More →

Q. What is the mean of the data set: 2, 4, 6, 8, 10?

A. 4
B. 5
C. 6
D. 8

Solution

Mean = (2 + 4 + 6 + 8 + 10) / 5 = 30 / 5 = 6.

Correct Answer: C — 6

Learn More →

Q. What is the mean of the data set: 5, 10, 15, 20, 25?

A. 10
B. 15
C. 20
D. 25

Solution

Mean = (5 + 10 + 15 + 20 + 25) / 5 = 75 / 5 = 15.

Correct Answer: B — 15

Learn More →

Q. What is the mean of the first five prime numbers?

A. 5
B. 6
C. 7
D. 8

Solution

Mean = (2 + 3 + 5 + 7 + 11) / 5 = 28 / 5 = 5.6.

Correct Answer: B — 6

Learn More →

Q. What is the mean of the following data set: 2, 4, 6, 8, 10?

A. 4
B. 5
C. 6
D. 7

Solution

Mean = (2 + 4 + 6 + 8 + 10) / 5 = 30 / 5 = 6.

Correct Answer: C — 6

Learn More →

Q. What is the mean of the following data set: 5, 10, 15, 20, 25?

A. 10
B. 15
C. 20
D. 25

Solution

Mean = (5 + 10 + 15 + 20 + 25) / 5 = 75 / 5 = 15

Correct Answer: B — 15

Learn More →

Q. What is the mean of the following data: 2, 4, 6, 8, 10?

A. 5
B. 6
C. 7
D. 8

Solution

Mean = (2 + 4 + 6 + 8 + 10) / 5 = 30 / 5 = 6.

Correct Answer: B — 6

Learn More →

Q. What is the mean of the following numbers: 1, 1, 1, 1, 1?

A. 1
B. 2
C. 0
D. 5

Solution

Mean = (1 + 1 + 1 + 1 + 1) / 5 = 5 / 5 = 1.

Correct Answer: A — 1

Learn More →

Q. What is the mean of the following numbers: 2, 4, 6, 8, 10, 12?

A. 6
B. 7
C. 8
D. 9

Solution

Mean = (2 + 4 + 6 + 8 + 10 + 12) / 6 = 42 / 6 = 7.

Correct Answer: C — 8

Learn More →

Q. What is the mean of the following numbers: 2, 4, 6, 8, 10?

A. 5
B. 6
C. 7
D. 8

Solution

Mean = (2 + 4 + 6 + 8 + 10) / 5 = 30 / 5 = 6.

Correct Answer: B — 6

Learn More →

Q. What is the mean of the following numbers: 4, 8, 12, 16, 20?

A. 10
B. 12
C. 14
D. 16

Solution

Mean = (4 + 8 + 12 + 16 + 20) / 5 = 60 / 5 = 12.

Correct Answer: B — 12

Learn More →

Q. What is the mean of the following numbers: 4, 8, 12, 16?

A. 8
B. 10
C. 12
D. 14

Solution

Mean = (4 + 8 + 12 + 16) / 4 = 40 / 4 = 10.

Correct Answer: B — 10

Learn More →

Q. What is the median of the data set {7, 3, 5, 9, 1}?

A. 5
B. 3
C. 4
D. 7

Solution

First, arrange the data: {1, 3, 5, 7, 9}. The median is the middle value, which is 5.

Correct Answer: A — 5

Learn More →

Q. What is the median of the following data set: 1, 3, 3, 6, 7, 8, 9?

A. 3
B. 6
C. 7
D. 8

Solution

Median = 6 (middle value of the ordered set).

Correct Answer: B — 6

Learn More →

Q. What is the median of the following data set: 3, 1, 4, 2, 5?

A. 2
B. 3
C. 4
D. 5

Solution

Sorted data: 1, 2, 3, 4, 5. Median = 3 (middle value).

Correct Answer: B — 3

Learn More →

Q. What is the median of the following data set: 3, 5, 7, 9, 11, 13, 15?

A. 7
B. 8
C. 9
D. 10

Solution

Median = 9 (middle value).

Correct Answer: C — 9

Learn More →

Q. What is the median of the following numbers: 1, 3, 3, 6, 7, 8, 9?

A. 3
B. 6
C. 7
D. 8

Solution

Median = 6 (middle value of the ordered set).

Correct Answer: B — 6

Learn More →

Q. What is the median of the following numbers: 12, 15, 14, 10, 18?

A. 12
B. 14
C. 15
D. 18

Solution

Arranging the numbers: 10, 12, 14, 15, 18. Median = 14.

Correct Answer: B — 14

Learn More →

Q. What is the median of the following numbers: 3, 1, 4, 2, 5?

A. 2
B. 3
C. 4
D. 5

Solution

Arranging in order: 1, 2, 3, 4, 5. Median = 3.

Correct Answer: B — 3

Learn More →

Q. What is the median of the following numbers: 3, 7, 8, 12, 14?

A. 7
B. 8
C. 10
D. 12

Solution

Median = 8 (middle value in ordered list).

Correct Answer: B — 8

Learn More →

Q. What is the median of the following numbers: 7, 9, 12, 15, 18, 20?

A. 12
B. 13
C. 14
D. 15

Solution

Median = (12 + 15) / 2 = 27 / 2 = 13.5.

Correct Answer: A — 12

Learn More →

Q. What is the mode of the data set: 1, 2, 2, 3, 4, 4, 4, 5?

A. 1
B. 2
C. 3
D. 4

Solution

The mode is the number that appears most frequently, which is 4.

Correct Answer: D — 4

Learn More →

Q. What is the mode of the data set: 1, 2, 2, 3, 4?

A. 1
B. 2
C. 3
D. 4

Solution

Mode is the number that appears most frequently. Here, mode = 2.

Correct Answer: B — 2

Learn More →

Q. What is the mode of the data set: 5, 1, 2, 5, 3, 5, 4?

A. 1
B. 2
C. 5
D. 3

Solution

Mode is the number that appears most frequently. Here, mode = 5.

Correct Answer: C — 5

Learn More →

Statistics & Probability

On a scale of 0–10, how likely are you to recommend The Soulshift Academy?