Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 70

Hypothesis test for difference of mean when two groups have different size population

I want to conduct hypothesis testing to prove that there are no difference between two group's mean value. Null hyp: μ_group1-μ_group2=0 Alt hyp : μ_group1-μ_group2 != 0 my first...

Asked on 01/01/2021 by Ambleu

1 answer

Combining Error Terms into a General Error Term

Lets say I have 4 error terms: $$e_1,e_2,e_3,e_4$$ Each of these error terms come from different simulations of data using different classification methods. Let $gamma$ be the number...

Asked on 01/01/2021

1 answer

Should I delete or average repeating training inputs from a Gaussian Process?

I'm facing a problem with my GP regression, where I have (noisy) observations with repeating traininginputs x. I.e. I see observations f(x)=[1.1 1.2 3.0 2.9 4.3 4.4 4.9 5.0]...

Asked on 12/31/2020 by MvHaren

1 answer

Does data point ordering matter in LASSO regression?

I am working with Lasso on Python with a dataset of size 85×2000. I find that the ordering of the rows influence the result of the Lasso...

Asked on 12/31/2020 by Rik

0 answer

Split train//validation/test sets by time, is it correct?

Here's the scenario, slightly altered to a common one. Credit card fraud, payments for the last 12 months (a rolling window). Train with the data from the first 10 months,...

Asked on 12/31/2020 by wishihadabettername

3 answer

Bayesian inference on mean of statistic from population

Suppose that a collection of time intervals $t_i$ have occurred, for $i=1,...,n$. These should be considered as samples from a population governed by some distribution. During these time intervals, some...

Asked on 12/31/2020 by Helmut

1 answer

How to plot $x^{1700}(1-x)^{300}$?

I'm trying to plot a Bernoulli likelihood function on R: $$x^{1700}(1-x)^{300}$$ But when I try to plot this function on R it looks like this:...

Asked on 12/30/2020

3 answer

Relaxed Lasso Logistic Regression: Estimating second penalty parameter

I'm trying a relaxed lasso logistic regression by first using sklearn's cross validation to find an optimal penalty parameter (C = 1/lambda). Then, I use that parameter to fit statsmodel's...

Asked on 12/30/2020 by Joanne Cheung

2 answer

Chi squared test questions

As part of a small study, I've have put together a table with results from a population of individuals stratified by age. For each line, I would like to perform...

Asked on 12/30/2020 by Woodpigeon

0 answer

QQ plot comparison of z-normalized datasets

I want to make sure I'm correct in my assumptions.I'm predicting financial returns by using different ML models. There are 4500 values in each dataset.The density plots of...

Asked on 12/30/2020 by PrinzvonK

1 answer

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