WnioskowanieStatystyczne/Bonferroni: Różnice pomiędzy wersjami

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JCGM 100:2008
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===Evaluation of measurement data — Guide to the expression of uncertainty in measurement===
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JCGM 100:2008 GUM 1995 with minor corrections http://www.iso.org/sites/JCGM/GUM-JCGM100.htm
  
GUM 1995 with minor corrections
 
 
Evaluation of measurement data — Guide to the expression of uncertainty in measurement
 
  
 
''3.4.8  Although this Guide provides a framework for assessing uncertainty, it cannot substitute for critical thinking, intellectual honesty and professional skill. The evaluation of uncertainty is neither a routine task nor a purely mathematical one; it depends on detailed knowledge of the nature of the measurand and of the measurement. The quality and utility of the uncertainty quoted for the result of a measurement therefore ultimately depend on the understanding, critical analysis, and integrity of those who contribute to the assignment of its value.''
 
''3.4.8  Although this Guide provides a framework for assessing uncertainty, it cannot substitute for critical thinking, intellectual honesty and professional skill. The evaluation of uncertainty is neither a routine task nor a purely mathematical one; it depends on detailed knowledge of the nature of the measurand and of the measurement. The quality and utility of the uncertainty quoted for the result of a measurement therefore ultimately depend on the understanding, critical analysis, and integrity of those who contribute to the assignment of its value.''

Wersja z 15:50, 4 maj 2017

Wielokrotne porównania

[math]N[/math] obserwacji podzielonych na 7 grup. Testujemy hipotezę, że średnie tych grup są równe -- czyli niejako przyporządkowanie do grup jest przypadkowe. Możemy wykonać [math]\binom{7}{2}=21[/math] testów różnic między grupami. Jeśli przyjmiemy poziom istotności 0.05 ...

Problem wielokrotnych porównań (ang. multiple comparisons) pojawia się w eksploracyjnej (w odróżnieniu od konfirmacyjnej) analizie danych, kiedy np. nie wiemy gdzie oczekiwać różnic.

Korekcja Bonferroniego polega na podzieleniu poziomu istotności przez liczbę porównań. Jest mocno konserwatywna.


por. http://en.wikipedia.org/wiki/Data_dredging zwane też [math]p[/math]-hacking.


Evaluation of measurement data — Guide to the expression of uncertainty in measurement

JCGM 100:2008 GUM 1995 with minor corrections http://www.iso.org/sites/JCGM/GUM-JCGM100.htm


3.4.8 Although this Guide provides a framework for assessing uncertainty, it cannot substitute for critical thinking, intellectual honesty and professional skill. The evaluation of uncertainty is neither a routine task nor a purely mathematical one; it depends on detailed knowledge of the nature of the measurand and of the measurement. The quality and utility of the uncertainty quoted for the result of a measurement therefore ultimately depend on the understanding, critical analysis, and integrity of those who contribute to the assignment of its value.