un poder del 80%

English translation: power

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
Spanish term or phrase:poder
English translation:power
Entered by: MJ Barber

13:27 Jan 11, 2004
Spanish to English translations [PRO]
Mathematics & Statistics / statistics - Fisher's exact test
Spanish term or phrase: un poder del 80%
Utilizando el test de Fisher, con un nivel de significación del 0,05% y un poder del 80%, una muestra de 25 pacientes en cada grupo de tratamiento es suficiente para detectar diferencias de al menos el 30% en el porcentaje de pacientes en las que desaparece el melasma, asumiendo que la tasa de curación en el grupo activo es del 30% y en el grupo placebo del 0,1%.

Same text as last q. Sorry, but I don't quite understand this stuff.
MJ Barber
Spain
Local time: 13:00
power of 80%
Explanation:
MJ, this might help:

PODER - Power
Es la probabilidad de que sea cierta la hipótesis nula. Se expresa como 1-Error beta. Si el Error beta es 0.2, 1-0,2=0.8 u 80%.

Power analysis gives power for a specific effect size. For example, the researcher might report "If the treatment increases the recovery rate by 20 percentage points the study will have power of 80% to yield a significant effect". For the same sample size and alpha, if the treatment effect is less than 20 points then power will be less than 80%. If the true effect size exceeds 20 points, then power will exceed 80%.

Cheers,
Cindy
Selected response from:

tazdog (X)
Spain
Local time: 13:00
Grading comment
Very helpful, thanks.
4 KudoZ points were awarded for this answer



Summary of answers provided
4 +5power of 80%
tazdog (X)


  

Answers


16 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +5
power of 80%


Explanation:
MJ, this might help:

PODER - Power
Es la probabilidad de que sea cierta la hipótesis nula. Se expresa como 1-Error beta. Si el Error beta es 0.2, 1-0,2=0.8 u 80%.

Power analysis gives power for a specific effect size. For example, the researcher might report "If the treatment increases the recovery rate by 20 percentage points the study will have power of 80% to yield a significant effect". For the same sample size and alpha, if the treatment effect is less than 20 points then power will be less than 80%. If the true effect size exceeds 20 points, then power will exceed 80%.

Cheers,
Cindy



    Reference: http://www.dhsint.com/epidemiologos/lista-glosario.asp?letra...
    Reference: http://www.power-analysis.com/effect_size.htm
tazdog (X)
Spain
Local time: 13:00
Native speaker of: English
PRO pts in category: 8
Grading comment
Very helpful, thanks.

Peer comments on this answer (and responses from the answerer)
agree  rhandler
21 mins

agree  Ana Krämer
35 mins

agree  John Speese: agree, power is correct
1 hr

agree  Jane Lamb-Ruiz (X)
2 hrs

agree  Maria Lorenzo
3 hrs
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