If two random variables x and y are related by y = 2 – 3x, then the SD of y is given by

CA Foundation · Quantitative Aptitude · MTP · September 2024
If two random variables x and y are related by y = 2 – 3x, then the SD of y is given by
(A) A. -3 × SD of x
(B) B. 3 × SD of x.
(C) C. 9 × SD of x
(D) D. 2 × SD of x.

Suggested Answer and Working Notes:

Correct Answer: Option (B)

B. 3 × SD of x.

Topics: Part-C: Statistics

Open in Interactive Practice Hub · Full Practice Hub · Chapter Weightage · More in this subject

Related Questions in this Topic