Moderate
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.
Last updated
Practise Descriptive Statistics
238 free Descriptive Statistics MCQs from Statistics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Statistics questions like this
Statistics is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.