Questions tagged [application]
applications of statistics and statistical modeling
93
questions
0
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1answer
19 views
Application of transformations of lognormal distributed random variables
I'm answering questions from a book and I have to do a simple transformation Y=g(X) of a lognormal distribution:
$X \sim \mathcal{LN}(\mu,\,\sigma^{2})$ with $Y=ln(X)$
Then $Y \sim \mathcal{N}(\mu,\,\...
0
votes
1answer
32 views
How to apply Lyapunov CLT to data
I have a situation where I have around 30 classes of variables with different means and variances (though the means aren't too far from eachother; think 4-7) and that the distributions are right ...
0
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0answers
20 views
Book recommendations for Applied Statistics [duplicate]
Any good books focussed on applied statistics for self-study? If the book works with Python it'll be better for me.
I'm a Physicst with a Master in Science degree, but I don't want a rigurous book on ...
1
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0answers
20 views
Practical use for heritability value at sub-population level?
For me as a layperson, heritability is something that much smarter people than me calculate, and there are several questions already on the forum about how to do that (eg, this and this). I ...
0
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0answers
15 views
Common applications of prediction regions
I have written a paper in which I derive a prediction region for a certain statistical model. In order to illustrate it, I seek an example.
What are common applications of prediction regions? I can ...
0
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0answers
14 views
Regressing one Impulse response coefficients on another impulse response coefficients
I have estimated the impulse responses of several variables to a shock. Now I would like to know to whether interest rates affect the responses of some of the variables, say GDP. I have an idea of ...
0
votes
1answer
45 views
Optical flow models (FlowNet) training/finetuning process
I'm reading about optical flow models, particularly FlowNet and PWC-Net. I thought I understood how training and finetuning are being done, but I don't believe so anymore after trying to understand ...
0
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0answers
30 views
Applications of the Weibull and Reversed Weibull distribution
I'm trying to get some intuition for the GEV distributions. As I understand, the GEV distributions derive from the limiting maximum distributions, one of which is the Type III distribution, also ...
0
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0answers
20 views
Simple application of survival function of noncentral chi square distribution
Im looking for a new(ish) paper that is an application (with a simple setup and background) of the survival function of a noncentral (or with noncentrality parameter 0) chi square distribution. I want ...
1
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0answers
16 views
2 boxes of money, unknown money inside, one is twice the amount of the other [duplicate]
Suppose, I have two boxes. A host is telling me to pick one. I see the money inside of this one - say 100 \$. Now, I need to decide if I want to swap, given the information that the other box has ...
2
votes
1answer
137 views
Clarifying the applications of Bayesian networks
I have been looking at Bayesian networks, using the book by Koller, Probabilistic Graphical Models. The book is very large, so I might have missed the answer to my question ;). But I was trying to ...
0
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0answers
32 views
Calculate probability density by function application
let's assume we have a probability density function which is $$f(X) = \frac{a}{x^a+1}$$
how can we calculate something like this: $$Y = ln(X)$$
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0answers
12 views
Real applications using estimation of parameters
In the first classes of statistical inference we learn about parameter estimation of some classical statistical distributions (Bernoulli, Binomial, Poisson, Geometric, Normal, etc). I would like to ...
0
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0answers
10 views
how to decide for the final model on a prediction task
hope you are fine. I have a question in the field of model selection for the prediction task based on several influencing factors on the target variable:
I have a data set where I train, validate, and ...
0
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0answers
28 views
Which field of science applies the log-normal sample median distribution?
Which field of science applies the log-normal sample median distribution (i.e. the sample median distribution with samples from a log-normal parent)? I noticed that incubation periods are assumed log-...
1
vote
0answers
32 views
How to use a p-value sampling distribution?
As part of my research I have been looking into the sampling distribution of p-values. Even though p-values are on their way out, they are still used ubiquitously with the normal $\alpha$ =.05 cutoff (...
2
votes
1answer
37 views
Example of "alternating" mass function for discrete distribution
My question is related to this question on Math.SE where it was shown that there exist discrete distributions with probability mass functions that "oscillate" in a non-monotonic way over an ...
3
votes
1answer
92 views
Potential applications of a result (by Beyer et al) on distance concentration and meaningless nearest neighbors in high dimensions
My question is motivated by this question, and self-study of the paper "When is nearest neighbor meaningful?", where the authors show the following
Theorem 1: Let $X^{(d)} \in \mathbb{R}^d$ ...
2
votes
1answer
59 views
Psychology books FOR Statistics students
I can find a lot of book recommendations on Statistics for Psychology students. But can anyone suggest some good books for a Statistics student who wants to learn about applications of Statistics in ...
1
vote
1answer
77 views
What is "LASSO aggression"?
I found a paper that stated in the methods section that they ran "LASSO aggression". At first, I thought it was a funny typo but then I did a Google Search:
Google search
and found 187 sources ...
1
vote
1answer
26 views
Independence of censoring time $C$ and event time $T$ for randomised entry to a study
While reading through the textbook 'Modern Applied Statistics With S' by Venables and Ripley, I came across the following paragraph detailing the different types of censoring possible when dealing ...
4
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0answers
33 views
Productionize (applied) PCA to detect outlier etc. long term with new data?
I was wondering how one could use PCA in e.g. a dashboard for non Subject Matter Expert.
For example, you are quite certain that 2 PCs are sufficient based on the current data. It also makes sense for ...
1
vote
0answers
21 views
Web application with model results for use in healthcare?
Often in medicine we use scores, so the patient gets 1 point for this symptom, another for this etc. and a final a score determines their risk/treatment strategy.
If we have reliable data and build a ...
0
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0answers
19 views
How biased is a statistical study in which sampling was purposely made without repeats? [duplicate]
[Cross posted on Math.SE]
It is understood in mathematical statistics that a sample (as in sampling distribution) may very well contain repeatedly the same item/subject.
In practice though, it would ...
0
votes
1answer
96 views
Are sampling distributions of any statistic used in real life statistical analyses?
I feel I am pretty good on the mathematical basis of CLT and sampling distributions.
HOWEVER:
While sources like OpenIntro Statistics (Diez et al, 2019) are fairly straighforward with their actual ...
5
votes
2answers
148 views
What apples do worms prefer? [closed]
I'm confused with some practical statistical problem, for which I have limited data and don't understand how to start with the problem. If anybody can point how such problems are (traditionally) ...
1
vote
1answer
2k views
Can someone provide a brief explanation as to why reproducing kernel Hilbert space is so popular in machine learning?
I thought functional analysis was long thought to be old fashioned and generally a dead research area.
It seems that all of a sudden there is a huge fascination with so-called reproducing kernel ...
0
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0answers
18 views
Interpreting ANOVA results in the educational context
I have run an experiment in a six-week course to measure the effect of my educational treatment on student engagement. The treatment happens on weeks 4 and 6 of the course (for all of the students) ...
1
vote
1answer
84 views
Why should we study copulas? [closed]
I am new to the study of copulas and I would like that someone could provide some examples where they are applied, their usefulness and so on. Any help is appreciated. Thanks in advance.
0
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0answers
35 views
Summarize regression results on different datasets
I have 20 datasets (extracted from 20 different software systems) and fit a logistic regression model on each of them. On every dataset, the model was the same (same dependent variable and the same ...
41
votes
2answers
1k views
Evidence for man-made global warming hits 'gold standard': how did they do this?
This message in a Reuter's article from 25.02.2019 is currently all over the news:
Evidence for man-made global warming hits 'gold standard'
[Scientists] said confidence that human activities ...
2
votes
0answers
31 views
How do I measure effects over years in longitudinal panel data with individuals?
I'm working with a longitudinal panel dataset that surveys the same few thousand individuals biennially and I have six years of this data. My dependent variable would be how much individuals spend on ...
3
votes
1answer
73 views
How do I learn when to apply which statistical distributions? [closed]
I am learning Bayesian modeling and having trouble keeping straight when it is most appropriate to apply the various statistical distributions beyond the basic ones like the beta, binomial, and ...
4
votes
1answer
56 views
What does this paper mean by mean square error?
I'm reading a paper about estimating fetal weight by ultrasound and other techniques. In Table 2 they give descriptive statistics, to wit: of all the examiners, the one with the highest mean square ...
1
vote
1answer
74 views
Do you know of business applications of Reinforcement Learning?
I'm looking for literature on the application of Reinforcement Learning (RL) algorithms in a business context. Most articles and examples in books on RL are about the application of RL to games (...
2
votes
0answers
78 views
Variables common to all individuals in a panel
I have been tasked with evaluating the efficiency of different marketing tools for a microfinance bank.
I have a panel of seven individuals (seven districts of Tajikistan) over 17 months.
Dependent ...
2
votes
1answer
353 views
What modeling problem does ridge regression solve?
If your modeling problem is that you have too many features, a solution to this problem is LASSO regularization. By forcing some feature coefficients to be zero, you remove them, thus reducing the ...
1
vote
1answer
168 views
Testing the scope of application of a logistic regression model
My aim is to assess whether I can apply a logistic regression that was fitted on a sample A (where I have explanatory variables and the outcomes) to a different sample B where I don't know the ...
4
votes
0answers
395 views
Difference between Stochastic Approximation (SA) and Stochastic Gradient Descent (SGD)
I understand the intended use cases for both stochastic approximation algorithms like SPSA or FDSA, and for SGD algorithms like Adam.
SPSA is intended for noisy objective functions, and Adam for ...
1
vote
0answers
142 views
Mixture of power-law distribution
I have two large sets A and B of (integer) numbers, both obtained with two different (and unknown) probability distributions $\rho_A$ and $\rho_B$.
A (also large) set C contains a proportion $p$ of ...
8
votes
1answer
4k views
How Do You Choose The Number of Bins To Use For A Chi-Squared GOF Test?
I'm working on developing a physics lab about radioactive decay, and in analyzing sample data I've taken, I ran into a statistics issue that surprised me.
It is well known that the number of decays ...
1
vote
1answer
139 views
Population proportion inference: what statistical error am I committing here?
I am struggling to understand the following paradox.
Suppose we have a large population of people who exhibit different values of a trait, e.g. they are sick with different strains of a virus. ...
0
votes
2answers
471 views
Compare the slopes of categorical data
Hello I want to compare the slopes of the linear regression lines for the following distributions of sales figures over the years 2009 to 2017.
I want to compare the slopes of the regression lines - ...
2
votes
1answer
256 views
Real world applications of regressing complex numbers?
I recently extended a linear regression software I developed to include complex variables. It works very well but I am not familiar with how this can be used in the real world. I scoured the web to ...
5
votes
2answers
4k views
(Practical) Applications or RNN
I have been googling for a list of practical applications of Recurrent Neural Networks for some time, but did not find a reasonable reference list.
Most of the things are about text generation which ...
1
vote
2answers
224 views
Android Recommendation App Algorithm
I have this project proposal entitled "Android Based Program Recommendation App". (This application is for those college students who wants to shift to other programs).
The app will find a program ...
1
vote
1answer
78 views
Infering relative importance of features in driving a dependent variable
In an auctions website I maintain, auctions are listed most-recent-first. There are 20 auctions per page. A user can click next in the footer to view older auctions....
2
votes
0answers
103 views
Applying machine learning to dynamic complex systems (e.g. weather prediction)
Would it be correct to say that:
Physics-based, domain specific models are more widely used and are more practical in (longer term) weather forecasts than pure machine learning approaches
The reason ...
2
votes
0answers
72 views
Practical application for theoretical sampling process
Does the following sampling process model any particular real life scenario ? If so, could you point me to some relevant scientific papers.
Consider an arbitrary probability distribution $\mathcal{D}$...
3
votes
0answers
2k views
Finding correlations in a large dataset
My main objective is to find correlations between process parameters and their impact (more specifically: the amount of wear measured) on specific sections of equipment used in the process.
I've ...
