Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 53

Different z and Wald values in logistic regression analyses between SPSS and R

I am running a binomial logistic regression in R. My colleague is running the same regression in SPSS. Our DV is dichotomous and data is non-normally distributed. The IVs are...

Asked on 02/23/2021 by Afton Nelson

0 answer

Creating an index using transactional data

I have a dataset of a series of leases. Variables we have: precinct, date (in quarters), lettable area, price as well as a few others. These assets are not homogenous,...

Asked on 02/23/2021 by Jamzy

0 answer

How does a pdf change after a variable transformation with another random variable?

I have a probability density function of the energy $f(E)$ of a distribution of particles. Now, each energy gets shifted according to an angle $theta$: $$E_{after} =...

Asked on 02/23/2021 by fluctuation

1 answer

A tail bound for an unknown distribution via sampling

I know that many results exist for making an argument about the tail of a distribution, i.e., for a random variable $X$, one can find a bound $epsilon$...

Asked on 02/22/2021 by Bashir

1 answer

Negative Sampling in Word2Vec - Embedding Vector / Amount of Samples

I understand that negative sampling in the skip-gram model of word2vec changing the classification from given a center word c, what is the probability of a context word o to...

Asked on 02/22/2021 by Maxbit

0 answer

NxN- fold cross validation

I just stumbled over the expression NxN- fold cross validation and i am not sure what it's exact meaning. N-fold cross validation, as i understand it, means we partition our...

Asked on 02/21/2021 by Tauling

1 answer

Compare regression coefficients within the same model

I ran a regression model with around 10 regression coefficients. I now want to test wether these regression coefficients are significantly different from one another. How do I do this?...

Asked on 02/21/2021 by shenflow

2 answer

How to predict an event for different time intervals and compute score?

Let's say I have a medical dataset/EHR dataset that is retrospective and longitudinal in nature. Meaning one person has multiple measurements across multiple time points (in the past). This dataset...

Asked on 02/21/2021

1 answer

What are arguments against using the (log-)likelihood as a loss function?

Context: My goal is to fit a GEV distribution function to data $z$, where the location parameter is parametrised as linear combination of predictor variables $mu(vec{x}) = mu_0...

Asked on 02/21/2021 by Joel

1 answer

How to interpret a ROC curve?

I applied logistic regression to my data on SAS and here are the ROC curve and classification table. I am comfortable with the figures...

Asked on 02/20/2021 by Günal

5 answer

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