# Random variable of twice another random variable

If Y is a random variable with a mean $\mu$ and a standard deviation, $\sigma$, how do I calculate W if W = 2Y? Is it just $2\mu$ and $2\sigma$?

• Do you know properties like linearity of expectation? – Lucien Oct 27 '13 at 17:53
• No. But from what I understand below, all that was said was that the constant can be taken out of the formula. Is that all that changes? – daniella Oct 27 '13 at 18:15