Mathematically bad behavioral distributions The 2019 Stack Overflow Developer Survey Results Are InCorrelation between Beta distributionsIndependent distributionsHypothesis Testing on Exponential distributionsJoint distribution of multiple binomial distributionsMean and Variance of probability distributionscalculating exponential distributions for products going badExponential and poisson distributionsContinuous distributionsDistribution of combination of independent distributionsSubstituting variables for probability distributions

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Mathematically bad behavioral distributions



The 2019 Stack Overflow Developer Survey Results Are InCorrelation between Beta distributionsIndependent distributionsHypothesis Testing on Exponential distributionsJoint distribution of multiple binomial distributionsMean and Variance of probability distributionscalculating exponential distributions for products going badExponential and poisson distributionsContinuous distributionsDistribution of combination of independent distributionsSubstituting variables for probability distributions










0












$begingroup$


I'm studying asymptotic theory and have found that most of the distributions shown in textbooks have "good" properties like differentiability and integrability.
Edgeworth expansion, for example, apparently gives a good approximation for a density function, but the theory needs strong assumptions.



In some areas, "bad" behavioral distributions play a great role. Cauchy distribution is used in mathematical science since it has a fat tail.



I would like to know important distributions with troublesome properties and how researchers are approaching them.



Thank you in advance!










share|cite|improve this question









$endgroup$











  • $begingroup$
    You can get a fat tail without giving up CLT benefits the way Cauchy does; it's enough to use Student's $t$ with multiple degrees of freedom.
    $endgroup$
    – J.G.
    Mar 23 at 19:08










  • $begingroup$
    Yes, certainly t distribution may work well in this case. I mentioned this just as an example. What I want to know is how to approach bad distributions like Cauchy. I suppose that CLT cannot be applied to such distributions, but is there any similar method to analyze them? I would appreciate it if you could give some examples. I'm also glad if you could introduce some useful articles.
    $endgroup$
    – Paruru
    Mar 23 at 19:22










  • $begingroup$
    It depends what you mean by "bad". It's one thing to lack a finite mean and variance; it's quite another for the CDF to not be differentiable. And incidentally, although the Cauchy's sample mean doesn't become approximately Gaussian as sample size $toinfty$, the sample median does (see e.g. this application of the delta method).
    $endgroup$
    – J.G.
    Mar 23 at 19:28















0












$begingroup$


I'm studying asymptotic theory and have found that most of the distributions shown in textbooks have "good" properties like differentiability and integrability.
Edgeworth expansion, for example, apparently gives a good approximation for a density function, but the theory needs strong assumptions.



In some areas, "bad" behavioral distributions play a great role. Cauchy distribution is used in mathematical science since it has a fat tail.



I would like to know important distributions with troublesome properties and how researchers are approaching them.



Thank you in advance!










share|cite|improve this question









$endgroup$











  • $begingroup$
    You can get a fat tail without giving up CLT benefits the way Cauchy does; it's enough to use Student's $t$ with multiple degrees of freedom.
    $endgroup$
    – J.G.
    Mar 23 at 19:08










  • $begingroup$
    Yes, certainly t distribution may work well in this case. I mentioned this just as an example. What I want to know is how to approach bad distributions like Cauchy. I suppose that CLT cannot be applied to such distributions, but is there any similar method to analyze them? I would appreciate it if you could give some examples. I'm also glad if you could introduce some useful articles.
    $endgroup$
    – Paruru
    Mar 23 at 19:22










  • $begingroup$
    It depends what you mean by "bad". It's one thing to lack a finite mean and variance; it's quite another for the CDF to not be differentiable. And incidentally, although the Cauchy's sample mean doesn't become approximately Gaussian as sample size $toinfty$, the sample median does (see e.g. this application of the delta method).
    $endgroup$
    – J.G.
    Mar 23 at 19:28













0












0








0


1



$begingroup$


I'm studying asymptotic theory and have found that most of the distributions shown in textbooks have "good" properties like differentiability and integrability.
Edgeworth expansion, for example, apparently gives a good approximation for a density function, but the theory needs strong assumptions.



In some areas, "bad" behavioral distributions play a great role. Cauchy distribution is used in mathematical science since it has a fat tail.



I would like to know important distributions with troublesome properties and how researchers are approaching them.



Thank you in advance!










share|cite|improve this question









$endgroup$




I'm studying asymptotic theory and have found that most of the distributions shown in textbooks have "good" properties like differentiability and integrability.
Edgeworth expansion, for example, apparently gives a good approximation for a density function, but the theory needs strong assumptions.



In some areas, "bad" behavioral distributions play a great role. Cauchy distribution is used in mathematical science since it has a fat tail.



I would like to know important distributions with troublesome properties and how researchers are approaching them.



Thank you in advance!







probability-theory statistics probability-distributions asymptotics






share|cite|improve this question













share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked Mar 23 at 18:58









ParuruParuru

83




83











  • $begingroup$
    You can get a fat tail without giving up CLT benefits the way Cauchy does; it's enough to use Student's $t$ with multiple degrees of freedom.
    $endgroup$
    – J.G.
    Mar 23 at 19:08










  • $begingroup$
    Yes, certainly t distribution may work well in this case. I mentioned this just as an example. What I want to know is how to approach bad distributions like Cauchy. I suppose that CLT cannot be applied to such distributions, but is there any similar method to analyze them? I would appreciate it if you could give some examples. I'm also glad if you could introduce some useful articles.
    $endgroup$
    – Paruru
    Mar 23 at 19:22










  • $begingroup$
    It depends what you mean by "bad". It's one thing to lack a finite mean and variance; it's quite another for the CDF to not be differentiable. And incidentally, although the Cauchy's sample mean doesn't become approximately Gaussian as sample size $toinfty$, the sample median does (see e.g. this application of the delta method).
    $endgroup$
    – J.G.
    Mar 23 at 19:28
















  • $begingroup$
    You can get a fat tail without giving up CLT benefits the way Cauchy does; it's enough to use Student's $t$ with multiple degrees of freedom.
    $endgroup$
    – J.G.
    Mar 23 at 19:08










  • $begingroup$
    Yes, certainly t distribution may work well in this case. I mentioned this just as an example. What I want to know is how to approach bad distributions like Cauchy. I suppose that CLT cannot be applied to such distributions, but is there any similar method to analyze them? I would appreciate it if you could give some examples. I'm also glad if you could introduce some useful articles.
    $endgroup$
    – Paruru
    Mar 23 at 19:22










  • $begingroup$
    It depends what you mean by "bad". It's one thing to lack a finite mean and variance; it's quite another for the CDF to not be differentiable. And incidentally, although the Cauchy's sample mean doesn't become approximately Gaussian as sample size $toinfty$, the sample median does (see e.g. this application of the delta method).
    $endgroup$
    – J.G.
    Mar 23 at 19:28















$begingroup$
You can get a fat tail without giving up CLT benefits the way Cauchy does; it's enough to use Student's $t$ with multiple degrees of freedom.
$endgroup$
– J.G.
Mar 23 at 19:08




$begingroup$
You can get a fat tail without giving up CLT benefits the way Cauchy does; it's enough to use Student's $t$ with multiple degrees of freedom.
$endgroup$
– J.G.
Mar 23 at 19:08












$begingroup$
Yes, certainly t distribution may work well in this case. I mentioned this just as an example. What I want to know is how to approach bad distributions like Cauchy. I suppose that CLT cannot be applied to such distributions, but is there any similar method to analyze them? I would appreciate it if you could give some examples. I'm also glad if you could introduce some useful articles.
$endgroup$
– Paruru
Mar 23 at 19:22




$begingroup$
Yes, certainly t distribution may work well in this case. I mentioned this just as an example. What I want to know is how to approach bad distributions like Cauchy. I suppose that CLT cannot be applied to such distributions, but is there any similar method to analyze them? I would appreciate it if you could give some examples. I'm also glad if you could introduce some useful articles.
$endgroup$
– Paruru
Mar 23 at 19:22












$begingroup$
It depends what you mean by "bad". It's one thing to lack a finite mean and variance; it's quite another for the CDF to not be differentiable. And incidentally, although the Cauchy's sample mean doesn't become approximately Gaussian as sample size $toinfty$, the sample median does (see e.g. this application of the delta method).
$endgroup$
– J.G.
Mar 23 at 19:28




$begingroup$
It depends what you mean by "bad". It's one thing to lack a finite mean and variance; it's quite another for the CDF to not be differentiable. And incidentally, although the Cauchy's sample mean doesn't become approximately Gaussian as sample size $toinfty$, the sample median does (see e.g. this application of the delta method).
$endgroup$
– J.G.
Mar 23 at 19:28










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