정답
$E(X) = \sum x_i \cdot P(x_i) = x_1 P(x_1) + x_2 P(x_2) + \dots + x_k P(x_k)$.
해설
Expected value represents the long-term average outcome of a random process repeated many times.
홈 / 라이브러리 / ACT Mastery: English, Math, Reading & Science / AI 플래시카드
What is the expected value $E(X)$ of a discrete random variable with outcomes $x_i$ and probabilities $P(x_i)$?
덱 'ACT Mastery: English, Math, Reading & Science'의 플래시카드.