Question

If X is a random variable such that $\sigma$(X) = 2.6, then $\sigma$(1 - 4X) is equal to,

• A. 7.8
• B. - 10.4
• C. 13
• D. 10.4

Answer 1

Answer: (D)

$\sigma \left(a+bx\right)=\left|b\right|\sigma \left(x\right)$