PRC-2 · Chapter 8 · Question 36 of 60
If a constant value of 8 is mathematically added to every single observation in a dataset, what will be the resulting effect on the dataset's variance?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: C) It will strictly remain unchanged.
Explanation
Variance measures the spread or dispersion of data. Adding or subtracting a constant merely shifts the entire dataset (change of origin) without altering how spread out the individual points are from one another.
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