If the standard deviation of the values 2, 4, 6, 8 is 2.58, then the standard deviation of the values 4, 6, 8, 10 is_______________?
Correct answer: B. 2.58
- A. 0
- B. 2.58
- C. 5
- D. 4.66
- E. 2.33
Explanation
Adding 2 to every observation changes the mean but not the deviations from the mean, so the standard deviation remains 2.58. This invariance holds for either population or sample standard deviation.
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