Cross Validated
Mark L. Stone's user avatar
Mark L. Stone's user avatar
Mark L. Stone's user avatar
Mark L. Stone
  • Member for 8 years, 6 months
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266 Answers

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53 votes
Accepted

Do we need gradient descent to find the coefficients of a linear regression model?

50 votes
Accepted

How does the L-BFGS work?

27 votes
Accepted

Why are optimization algorithms defined in terms of other optimization problems?

26 votes

Why is logistic regression called a machine learning algorithm?

25 votes
Accepted

Why not use the "normal equations" to find simple least squares coefficients?

20 votes

Intuitive explanation for dividing by $n-1$ when calculating standard deviation?

20 votes
Accepted

Expected value vs. most probable value (mode)

19 votes

For i.i.d. random varianbles $X$, $Y$, can $X-Y$ be uniform [0,1]?

17 votes
Accepted

Is every correlation matrix positive definite?

17 votes
Accepted

Is it meaningful to calculate standard deviation of two numbers?

15 votes
Accepted

Does there exist any univariate distribution that we can't sample from?

14 votes

Are a sum and a product of two covariance matrices also a covariance matrix?

14 votes

How can I test a nonlinear vs a linear regression model?

12 votes

Free statistical textbooks

12 votes
Accepted

Relation between Covariance matrix and Jacobian in Nonlinear Least Squares

12 votes

Why use upper triangular Cholesky?

11 votes
Accepted

Mean of inverse exponential distribution

11 votes

Distribution of $(X+a)^2$ where $X$ is a standard normal and $a$ is a constant

11 votes

How to use the Cholesky decomposition, or an alternative, for correlated data simulation

10 votes
Accepted

Unbiased estimators of skewness and kurtosis

10 votes

Generate normally distributed random numbers with non positive-definite covariance matrix

10 votes

1/2 on lagrangian equation from lasso

9 votes
Accepted

Any optimization problem can be expressed as one with a linear objective

9 votes
Accepted

Probability of the mininum

9 votes

How to cross validate stepwise logistic regression?

9 votes

Who Are The Bayesians?

9 votes
Accepted

Getting expected value from Standard Deviation and Skew?

8 votes
Accepted

Computing Highest Density Region given multivariate normal distribution with dimension $d$ > 3

8 votes
Accepted

Where is a complex root on the unit circle?

8 votes
Accepted

Given $X,Y\sim i.i.U[0,1]$, what is $P(X<Y)$?

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