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heteroskedasticity

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00:54 Sep 25, 2020
English to Czech translations [PRO]
Bus/Financial - Economics
Additional field(s): Business/Commerce (general), Economics, Finance (general), Investment / Securities, Mathematics & Statistics
English term or phrase: heteroskedasticity
Definition from Investopedia:
In statistics, heteroskedasticity (or heteroscedasticity) happens when the standard errors of a variable, monitored over a specific amount of time, are non-constant. With heteroskedasticity, the tell-tale sign upon visual inspection of the residual errors is that they will tend to fan out over time

Example sentence(s):
  • Most real world data will probably be heteroskedastic. However, one can still use ordinary least squares without correcting for heteroskedasticity because if the sample size is large enough, the variance of the least squares estimator may still be sufficiently small to obtain precise estimates. Methods for Detecting and Resolving...
  • Heteroskedasticity can also occur if there are subpopulation differences or other interaction effects (e.g. the effect of income on expenditures differs for whites and blacks). (Again, the problem arises from violation of the assumption that no such differences exist or have already been incorporated into the model.) Richard Williams, Univ. of Notre Dame
  • If heteroskedasticity does not cause bias or inconsistency in he OLS estimators, why did we introduce it as one of the Gauss-Markov assumptions? Hedibert
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Question posted on behalf of translation team:
GBK economics and finances specialistsGBK economics and finances specialists


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Summary of translations provided
5 +1Heteroskedasticita
Iva Vavrova


  

Translations offered


15 hrs   confidence: Answerer confidence 5/5 peer agreement (net): +1
Heteroskedasticita


Definition from Finance v praxi:
Heteroskedasticita ve statistice dat znamená, že náhodná složka nemá konstantní rozptyl.

Example sentence(s):
  • Identifikujeme-li v datech heteroskedasticitu, pokusíme se rozptyl stabilizovat pomocí vhodné transformace (mocninné, logaritmické). Pokud dojde ke stabilizaci rozptylu, použijeme analýzu rozptylu na transformovaných datech. - Martina Litschmannová Úvod do statisti  
  • Homoskedasticita náhodné složky – náhodná složka modelu má v čase konstantní rozptyl. Pokud tomu tak není, mluvíme o heteroskedasticitě. - Úvod do analýzy časových řad  
Iva Vavrova
Czech Republic
Local time: 22:43
Native speaker of: Czech

Votes in favor of/against selecting this as the best translation of the term asked
Yes  Josef Pomikalek
30 days
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