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Cross Validated : Recent Questions and Answers (Page 82)

Find answers to your questions about Cross Validated or help others by answering their Cross Validated questions.

What test shall I use to validate the use of a certain score to predict my outcome in a survival analysis?

I validate usage of a clinical cardiovascular score to predict the risk of dementia using data from a longitudinal study. Therefore, my outcome is binary (dementia yes or not) and...

Asked on 11/08/2020

1 answer

Individual sampling weights and percentages

I am working with public use microdata measuring educational attainment. I want to calculate the percentage of the population older than 25. I am merely unaware of how to use...

Asked on 11/06/2020 by Seth C.

1 answer

he_normal (Keras) is truncated when kaiming_normal_ (pytorch) is not

Thanks for having a look at my post. I had an extensive look at the difference in weight initialization between pytorchand Keras, and it appears that the definition of...

Asked on 11/03/2020 by londumas

1 answer

How do I treat my Confounding variables in my multivariate Linear Mixed Model?

I'm trying to build a linear mixed model for 5 outcome variables ...Cholesterol 1,Cholesterol 2,Cholesterol 3,Cholesterol 4,Cholesterol 5which will be melted into a single Cholesterol variable, since statsmodel does not...

Asked on 10/29/2020 by Thomas Lordick

1 answer

Bayesian Likelihood function range

I have given a prior which has a range of data between[0.5,1.5] and a normal distribution N(0.9,1) which should truncate at the above range and normalize. also I have the...

Asked on 10/29/2020 by SHAMM

1 answer

Convergence of bootstrap standard error estimate (one of the problems from Efron's book)

I am trying to solve problem 2.5 from the Efron/Tibshirani book, An Introduction to the Bootstrap (page 16). The problem asks to show that by applying the weak law of...

Asked on 10/26/2020 by Mattjosh

0 answer

Zero inflated continuous outcome variables

I am trying to model a continuous outcome variable(non-integer, with excess zeros) by two independent variables. I have seen that people have referred to the compound poisson gamma model( ...

Asked on 10/26/2020 by michaelkyei

0 answer

How to test paired observations

I have a set of data that look like this: Spray.A Spray.B1 10 112 ...

Asked on 10/23/2020 by Doug Fir

1 answer

How to project a mxn matrix (m features, n samples) onto a space generated by a mxk matrix (m features, k factors)?

I got two matrices A and B, the dimension of A is m x n, where n represents the number of samples, and m represents the number of features. Then...

Asked on 10/20/2020 by Minstein

0 answer

PCA loadings of correlation matrix

I know similar questions have been asked before already but I'm still a bit confused about the understanding of 'loadings'. Eigenvectors are unit-scaled loadings; and they are the coefficients...

Asked on 10/20/2020 by mri

0 answer

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