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sonicboom

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28	Intuition behind standard deviation
6	Can we go from $X_n = \mu + O_p(n^{-1})$ to $E[X_n] = \mu + O(n^{-1})$?
5	Is there a formula for the determinant of the covariance matrix $\mathbf{X_n}^T \mathbf{X_n}$ in the case of multiple regression?
4	Is $\left\{(\mathbf{X_n}^T\mathbf{X_n}/n)^{-1}\right\}_{n=1}^\infty$ uniformly integrable (UI)? What assumptions make it UI?
4	Are the estimated linear regression coefficients still normally distributed if one of the predictors is a factor variable?

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+10	If $E[\|X_n\|] = O(n)$ is $E[\|X_n\|^2] = O(n^2)$?
+30	As $n \to \infty$, can we 'ignore' a matrix in an expectation that does not depend on $n$?
+50	Is there a formula for the determinant of the covariance matrix $\mathbf{X_n}^T \mathbf{X_n}$ in the case of multiple regression?
+10	Intuition behind standard deviation

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0 asymptotics × 8	0 mathematical-statistics × 6
0 expected-value × 7	0 covariance × 4
0 convergence × 7	0 covariance-matrix × 3
0 random-variable × 6	0 multiple-regression × 3
0 regression × 6	0 approximation × 3

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1	down		27	answer		2

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