Multiple choice

Which measure of central tendency cannot be determined if the distribution has an open ended class?

  1. Arithmetic mean

  2. Median

  3. Mode

  4. Geometric mean
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A Correct answer
Explanation

Arithmetic mean requires actual values of all observations to compute the sum. When a class is open-ended (e.g., "60+"), the exact midpoint cannot be determined, making mean calculation impossible. Median depends only on position, mode on frequency, and both can be found even with open-ended classes.

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