Central Tendency & DispersionMTP May 20Question 3237 of 473
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The appropriate measure of dispersion for open-end classification is

Options

AStandard deviation
BMean deviation
CQuartile deviation
DAll these measures
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Correct Answer

✅ Option c — Quartile deviation

All Options:

  • AStandard deviation
  • BMean deviation
  • CQuartile deviation
  • DAll these measures

Detailed Solution & Explanation

An open-end classification is a frequency distribution where the outer boundaries of the first and/or last class intervals are not defined. Because of this, we cannot compute the midpoints of these intervals, making it impossible to calculate the standard deviation or mean deviation. However, the first and third quartiles (Q1\displaystyle Q_1 and Q3\displaystyle Q_3) lie inside the distribution and can be calculated, making **Quartile Deviation** the only appropriate measure of dispersion. Hence, **Option C** is the correct answer.

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