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Time Series Cross Validation by skicit learn and Cross Validation by Prophet

I have confusion between time series cross validation by skicit learn and cross validation by Prophet. So I'm trying to compare lstm algorithm with prophet and method The split data used for LSTM is ...
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1 answer
7 views

Conditions for a Random Variable to Satisfy a Probability Bound on Boundary Points

Let $X$ be a random variable supported on $\mathcal{X}\subset\mathbb{R}^{d}$, and let $\mathcal{X}$ be compact. Consider $f$ as the probability density of $X$. My question is: What conditions ...
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7 views

How to predict using a copula approach?

I have a dataset with both continuous and discrete variables the target variable is 0-1 and I was wandering on how to predict the target var with the copula regression. I'm using python to do so and I ...
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0 answers
21 views

Hypothesis testing of a prophecy

Is a single highly specific and improbable prophecy is enough to be convinced that it is not by chance? Or you need many prophecies to determine this? I understand that we have no way (maybe) of ...
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Use of multiple comparison correction and composite DV

I am investigating the effect of a single X on a composite DV, Y. I want to also investigate the effect of X on the 36 sub-components of Y. Thus, I would have to run 37 multiple regression models, ...
1 vote
0 answers
16 views

Can a regularizer be reverse engineered to induce precise modifications to the associated unregularized regression problem's solution?

The following is a picture of regularization in a regression problem... The blue line is unregularized or less regularized, and the green line is more regularized. Problems of this sort are often ...
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Cocor in r to compare two spearman correlation coefficients? [closed]

Can I use Cocor in r to compare two spearman correlation coefficients? And to compare two intraclass correlation coefficients (ICC)?
1 vote
1 answer
31 views

Competing Risks that are not mutually exclusive in Survival Analysis

I have 5 type of events that a subject can experience. However, not all these events are competing with each other: For the events A, B, C, D, E; occurrence of A blocks B from happening. B, D and E ...
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23 views

Dealing with a dataset with huge outliers [closed]

I am working on a dataset that has less than 100 samples and about 20 features. This dataset is related to a multi-regression problem about parameters in the field of medical physics related to organs ...
1 vote
0 answers
13 views

Diff-in-Diff with multiple time periods

this is my first post here and I'm very new, I hope this is somehow clear. For context: For my master thesis, I want to estimate the effect that replications have on the citations of a paper. For this,...
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7 views

What is the preferred procedure and associated methods when using an unobserved components model?

Let me start off by saying that my statistical knowledge is quite limited. If you spot any errors in my way of thinking, or have any good beginner references for me to read more about the topic I am ...
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19 views

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How to calculate k-means clustering with presence of double-zeroes? [closed]

I've tried to find species assemblages with a data set that has double-zeroes. When I run the tests, the results are inconclusive and no groups seem to be significant. I used hellinger's ...
2 votes
1 answer
10 views

Combined reliability for statistically independent tests/measurements

I'm perplexed by this statement in Wikipedia article, 'Consilience': "Statistically, if three different tests are each 90% reliable when they give a positive result, a positive result from all ...
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0 answers
6 views

NMDS with Morisita-Horn Index: which data-transformation makes sense?

I have a community matrix of spiders, which I captured during winter in different forest stand-types. I now want to perform an NMDs. For that I want to use the Morisita-Horn Index from R in the ...
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1 vote
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Calculate gradient with chain rule using additions [closed]

I am taking Karpathy's course, specifically I am on the first video. There is a step in the development of micrograd that I don't fully understand. Specifically in this section, when he talks about ...
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0 answers
18 views

Repeated Measures HLM in R using lme4 [closed]

I have conducted an experiment with within-subjects Design. Each participant interacted with two systems and after each interaction the same constructs were measured with a questionnaire. The order, ...
0 votes
1 answer
12 views

Reducing Variance with Regularization in LOOCV for Small Datasets

I have a small dataset and I am considering using Leave-One-Out Cross-Validation (LOOCV) to evaluate my model. I understand that cross-validation, in general, is a method to assess a model's ...
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1 answer
33 views

Would it be possible to use regularization methods as a feature selection method and then use machine learning models to analyses data?

My data is RNA-seq data with more than 14000 features and the problem is binary classification. Then the total sample is 50 and p>>n. When I use Elasticnet method with train and test data, the ...
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0 answers
14 views

How do i solve this problem on conditional probability [closed]

Where x~ u(0,4), what is P(X>Y|X<2Y) I know that X lies between Y at the lower bound and 2Y at the upper bound but i am having trouble trying to figure out P(X<2Y) as none of the examples i ...
5 votes
3 answers
161 views

ANOVA with unreliable measure

I’m doing some literature review on sports science, in particular the effect of training on endurance. There is no standard endurance tests. Some consist in intermittent contractions until exhaustion ...
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0 answers
6 views

Bibliometric & Co-occurrence Analysis

I am very new to network analysis and bibliometrics. So excuse for my silly & basic question. I am interested to find how Journals (academic) are related to one another. Each journals have their ...
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0 answers
19 views

Using the glm.nb() R package [closed]

I want to fit the negative binomial data using the glm.nb() function. For some reason, I already had the ground truth dispersion parameter of the negative binomial distribution, so I would only have ...
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Can someone give me an example of what a probability distribution looks like and its notation? [duplicate]

What is a probability distribution of a random variable X and what is the typical notation for a probability distribution? Can someone show me an example of what a probability distribution looks like ...
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15 views

Difference between xtreg and reghdfe [closed]

When I try to set my panel data with the following command in Stata xtset familyid MatricYear I get the following error ...
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1 vote
1 answer
29 views

Pearson chi square and correlation

My data are ordinal Pearson chi squared test value is 4.664 And asymp sig is 0.97 so the data are independent However pearson's R =-0.309 And the approx sig=0.037 Can they be independent and ...
1 vote
0 answers
38 views

How can you forecast transformed time series data?

I have time series data with both a trend and seasonal component. I removed this from the data using the following: ...
0 votes
0 answers
7 views

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Checking model after convergence issues with glmer logistic regression

I'm running a logistic regression model where subject ID is nested within litter ID, using glmer. The equation is as follows: glmer(outcome ~ group * time + previousStatus + (1|litter/pup), data, ...
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0 answers
11 views

Averaging classification metrics vs Direct infer

Suppose I have tensor X_test with this shape: (10,2,512) Where: 10 is num of ID 2 is num of Channel of every ID, let's say ...
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0 answers
14 views

In X-learner uplift modeling, predictions from the 1st-stage models help train the 2nd-stage models. What data splits should these predictions be on?

In uplift modeling with an X-learner metalearner (Künzel et al. 2019), predictions from the two first-stage models are used in training the two second-stage models. Question: What datasets/splits ...
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1 answer
26 views

Is a logistic regression appropriate for my question and correctly interpreted?

I need help knowing if my statistical approach is correct for what I want to achieve. I want to know whether a trial that follows an error (i.e., has a post.error value of 1) makes it more likely that ...
1 vote
1 answer
67 views

Does my observational study present as being a nested or crossed design?

I need some help deciding whether my sample collection design qualifies as nested or crossed. The design is: I collect data once per site (at the same 47 sites), once per season (wet and dry; May-Nov ...
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13 views

Simulate Gaussian copula with negative pair-wise correlations

I am now trying to simulate a multidimensional (let's say 4 dimensions) Gaussian copula. Given software restrictions, I can only use Excel for this simulation. That is why I am trying to implement the ...

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