Cross Validated
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Bertus101
  • Member for 3 years, 2 months
  • Last seen more than 2 years ago
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All Questions Answers
Score Newest
question
9
Trying to approximate $E[f(X)]$ - Woflram Alpha gives $E[f(X)] \approx \frac{1}{\sqrt{3}}$ but I get $E[f(X)] \approx 0$?
Nov 4, 2020
question
8
In reality, there is almost always measurement error in the independent variable(s), so why is this ignored in almost every linear regression model?
Sep 10, 2020
question
6
How do we visualize the Decomposition of Variance formula $\text{Var}[y] = \text{Var}_x[\text{E}[y|x]] + \text{E}_x[\text{Var}[y|x]]$?
Oct 30, 2020
question
5
Does an explicit expression exist for the moments of the residuals in least squares regression?
Nov 14, 2020
question
5
Separating $X$ from $Y$ in $E[(X^T Y))^p]$ for $p = 3$ and $4$?
Dec 4, 2020
question
4
If $Y|X \sim \mathcal{N}(0,1)$ then is $Y^2|X \sim \chi^2(1)$?
Nov 17, 2020
question
3
Calculating variance of sum of random variables - not sure if they are independent?
Oct 28, 2020
question
3
Trying to show $E[\hat \beta_1 | \mathbf{X}] = \beta_1$ directly from the definition of $\hat \beta_1$?
Oct 29, 2020
question
3
What is the probability distribution and variance of the OLS estimate $s^2$ of the error variance $\sigma^2$ in linear regression?
Nov 6, 2020
question
2
Is $E[Y (X_1+X_2)^2| \mathbf{X}] = (e^{3X_1}+3X_2) E[Y | \mathbf{X}]$ for $\mathbf{X} = [X_1 X_2]^T$?
Oct 29, 2020

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