Arithmetic mean is _________ by change of origin and scale of measurement?
Correct answer: C. Affected
- A. Vary
- B. Negative
- C. Affected
- D. Not affected
Explanation
A change of origin adds or subtracts a constant, while a change of scale multiplies the mean, so the arithmetic mean is affected by both. This differs from variance, which is unaffected by origin but changes with scale.
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