Measures of Central Tendency

JKSSB Finance Accounts Assistant · Statistics · 16 practice questions with answers and explanations: 3 Easy, 7 Medium, 6 Hard.

Sample questions

Sample Easy question 1

Find the median of 3, 9, 5, 7, 11, 1.

  1. 5
  2. 7
  3. 6
  4. 9
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Answer: C. Arranged: 1, 3, 5, 7, 9, 11. With six values, the median is the average of the 3rd and 4th: (5 + 7) ÷ 2 = 6.

Sample Medium question 2

What is the 'mode' of a dataset?

  1. The value that occurs most frequently
  2. The middle value
  3. The average of all values
  4. The range of the dataset
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Answer: A. The mode is the most frequently occurring value in a dataset.

Sample Hard question 3

The harmonic mean of 2 and 6 is:

  1. 3
  2. 4
  3. 3.46
  4. 2.5
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Answer: A. HM = 2ab ÷ (a + b) = (2 × 2 × 6) ÷ 8 = 3. For two numbers AM (4) ≥ GM (≈3.46) ≥ HM (3).

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