Probability MT22, Misc
Flashcards
What’s another way of saying the mean of a distribution?
The expectation of the distribution.
$X \sim B(n, p)$. What’s $\text{var } X$?
\[np(1-p)\]
What’s a trick for finding $\mathbb{E}[X^2]$ if you know $\mathbb{E}[X]$ and $\text{var}(X)$?
\[\mathbb{E}[X^2] = \text{var}(X) + \mathbb{E}[X]^2\]