Civil Service Numerical Reasoning Test Basic Statistics

Question 1

Find the mean of: 14, 18, 22, 10, 16.

Accepted Answer

16

Answer

Sum = 14 + 18 + 22 + 10 + 16 = 80. Mean = 80 ÷ 5 = 16.

Question 2

Find the median of: 3, 7, 5, 2, 9, 4, 6.

Accepted Answer

5

Answer

Arranged in order: 2, 3, 4, 5, 6, 7, 9. The middle value (4th of 7) is 5.

Question 3

Find the mode of: 4, 7, 2, 7, 9, 4, 7, 1.

Accepted Answer

7

Answer

7 appears three times, which is more than any other value. The mode is 7.

Question 4

Find the range of: 45, 12, 67, 33, 89, 21.

Accepted Answer

77

Answer

Range = highest − lowest = 89 − 12 = 77.

Question 5

A test was scored out of 50. Five students scored: 35, 42, 28, 47, 38. What is the mean score?

Accepted Answer

38

Answer

Sum = 35 + 42 + 28 + 47 + 38 = 190. Mean = 190 ÷ 5 = 38.

Civil Service Numerical Reasoning Practice Test