x^2: x^{\msquare} \log_{\msquare} \sqrt{\square} \nthroot[\msquare]{\square} \le \ge \frac{\msquare}{\msquare} \cdot \div: x^{\circ} \pi \left(\square\right)^{'} \frac{d}{dx} …

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2016年11月9日 · Imagine that $X$ is the side length of a square. Then $X^2$ is its area. Now $E(X)$ is the expected side length and $E(X^2)$ its expected area. It turns out the square of …

2022年11月29日 · For a random variable, denoted as X, you can use the following formula to calculate the expected value of X 2: E(X 2) = Σx 2 * p(x) where: Σ: A symbol that means “summation” x: The value of the random variable; p(x):The probability that the random variable takes on a given value; The following example shows how to use this formula in ...

What is (e^ {x^2})^2 ?

For a random variable $X$, $E(X^{2})= [E(X)]^{2}$ iff the random variable $X$ is independent of itself. This follows from the property of the expectation value operator that $E(XY)= E(X)E(Y)$ iff $X$ and $Y$ are independent random variables.