Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 44

What could be the reasons that making validation loss jumping up and down?

I am building some image classification model with reasonable size data (~3K) images in both training and validation set. However, I noticed the performance on validation set is not stable....

Asked on 11/02/2021 by Haitao Du

1 answer

Between-subject design and within-subject anlyses

I have a between-subject design in which there are two groups (A, B) and two conditions (x, y). I ran an ANOVA and found no interaction whatsoever and no significant...

Asked on 11/02/2021 by giorgio-p

1 answer

Likelihood function when there is no common dominating measure?

When we have a statistical model ${ P_theta, thetainTheta}$ on some common probability space, usually we define "the" likelihood function $L(theta)$ via a Radon-Nikodym derivative with respect to...

Asked on 11/02/2021 by kjetil b halvorsen

1 answer

Are these the major response variable types?

I am a biologist with an interest in experiment design. I recently refreshed my memory about what kinds of response variables that are possible, and made this chart (see jpeg)....

Asked on 11/02/2021 by Chris Science

0 answer

Exploding probability under simple hierarchical Bayesian formulation

I am wondering if someone here can clear up a point of confusion that I have when applying MCMC or an optimization method to hierarchical Bayesian problems. Let's say we...

Asked on 11/02/2021

1 answer

mixed model variance-covariance matrix| parameter estimation

I am fairly new to LMM's and I am trying to undestand how the parameter estimation happens;According to this:...

Asked on 11/02/2021 by Hedayat

1 answer

Looking to build the Mathematical proof that $ Var(hat{y}) = sigma^2textbf{H} $

I'm looking to build the proof that $$Var(hat{y}) = sigma^2textbf{H}$$ So I was going down this road and seem to have gotten a bit confused:$$...

Asked on 11/02/2021 by Seve Martinez

2 answer

How do I calculate confidence intervals on an elastic net regression in R

I am performing an elastic net regression on my data n = 34, p = 46 I first built the model using the "caret" package with the cross validation method...

Asked on 11/02/2021 by Alberto Pascale

1 answer

Is there an intuition behind the formula of chi-square?

Why in this formula $chi^2 = sum_i frac{(x_i - m_i)^2}{m_i}$, we divide by $m_i$ instead of $m_i^2$? Dividing by the squared value has a clear logic for...

Asked on 11/02/2021

1 answer

Finding C for a PMF of a frequency distribution

N has probability mass function: $p_o = p_1 =0$ and $p_k = c/k!$ for $k=2,3,4,...$ I used exp series $sum_{n=1}^{infty} frac{x^k}{k!} = e^x$ to get ...

Asked on 11/02/2021

1 answer

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