Measures of Central Tendency

JKSSB Panchayat Account Assistant · Mathematics/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. 7
  2. 6
  3. 9
  4. 5
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Answer: B. 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

Which measure of central tendency is most suitable for a frequency distribution with open-ended classes?

  1. Median
  2. Geometric mean
  3. Harmonic mean
  4. Arithmetic mean
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Answer: A. The median depends only on the middle position, so the unknown limits of open-ended classes do not matter.

Sample Hard question 3

The harmonic mean of 2 and 6 is:

  1. 3
  2. 2.5
  3. 3.46
  4. 4
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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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