Moderate
If Y=-8X - 5 and SD of X is 3, then SD of Y is______________?
Correct answer: C. 24
- A. 8
- B. 3
- C. 24
- D. None of these
Explanation
For a linear transformation Y = aX + b, the standard deviation is |a| times the standard deviation of X; the constant b has no effect. Hence SD(Y) = |-8| × 3 = 24.
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.