Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 28

What is the point of test set in ML?

The typical ML process consist of 3 sets:Training, Dev, Test set. But the actual training and tuning only happens in the training and dev sets. And the final result...

Asked on 11/29/2021 by Lelouche Lamperouge

4 answer

Proof that Cov(W+Y, Y-V) = 0 given that W, Y, and V are uncorrelated but not independent

$newcommand{Cov}{operatorname{Cov}}$I'm trying to prove the following statement: $Cov(W+Y , Y-V) = 0$, given the following constraints:$W$,$Y$, and $V$ are Uncorrelated but not independent$E(W)=E(Y)=E(V)=mu$...

Asked on 11/29/2021 by user292024

2 answer

Can linear and logistic regression coefficients be combined using an inverse variance weighted average?

Suppose I have coefficients from several studies, some are linear regressions and some are logistic regressions. They measure the same construct, but because of the nature of the experiments (i.e.,...

Asked on 11/29/2021

1 answer

How to construct one sided CI for Superiority Randomized Controlled Trial?

I am a Ph.D. student conducting a superiority randomized controlled trial to test the effect of text message reminders on the timeliness of child vaccination. I have considered one-sided alpha...

Asked on 11/29/2021 by user292068

1 answer

Working out expected steps of absorbent Markov Chain with more than one sink

So I've seen answers regarding the relative probabilities of winning given that two people are tossing coins until one wins, with one person winning with HHT and the other with...

Asked on 11/29/2021

0 answer

How do I calculate confidence level or interval?

I have this data for exam grades in English Literature: 2019: the numbers achieving (A*, A, B, C, D, E) are (1, 5, 4, 7, 2, 0, 0) 2018: the...

Asked on 11/29/2021 by user810739

0 answer

Power of two-sample test of binomial proportions

Suppose that I have info about a sample, and In one University, we have 70% females in the population and 30% males. In another University, the numbers are interchanged and...

Asked on 11/29/2021 by afternoon

1 answer

What is the most sound way to perform variable selection on an lmer() model?

Suppose I have 25 candidate predictors in an lmer model. I want to find out which ones are genuine predictors of the dependent variable. What is the best way to...

Asked on 11/29/2021

1 answer

Comparing AUC and classification loss for binary outcome in LASSO cross validation

I'm analyzing biological data where I'd like to see the impact of scaled gene expression on the classification of the sample. I binarized the response variable as 0 and 1...

Asked on 11/29/2021 by Atakan

1 answer

Examples of Simpson's Paradox being resolved by choosing the aggregate data

Most of the advice around resolving Simpson's paradox is that you can't decide whether the aggregate data or grouped data is most meaningful without more context. However, most of the...

Asked on 11/29/2021 by Richie Cotton

4 answer

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