Glossary entry

Spanish term or phrase:

tasas móviles

English translation:

moving rates / rolling rates

Added to glossary by Muriel Vasconcellos
Dec 10, 2015 09:19
8 yrs ago
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Spanish term

tasas móviles

Spanish to English Science Mathematics & Statistics Time aggregation
I couldn't find evidence to convince me that the translation is 'mobile rates'.

La tasa de mortalidad se calculará en este caso como la suma de las defunciones del período sobre la suma de las poblaciones de cada año que conforman el período. En algunos casos, cuando las poblaciones no están disponibles año a año, el denominador puede obtenerse como la población del año central del período multiplicada por la cantidad de años del período.
La agregación temporal permite mejorar también la presentación gráfica de la tendencia de la mortalidad, como puede apreciarse en el Gráfico 2. En él, la serie original de 12 años fue convertida en seis bienios lo cual permite reducir la oscilación (variabilidad) que se observa en los datos anuales.
Existe otra alternativa a la agregación por períodos que consiste en calcular las denominadas **tasas móviles**. En este caso, la metodología consiste en elegir un período de tiempo—en general, compuesto por un número impar de unidades, por ejemplo, tres años—y considerar entonces períodos desfasados en un año: en el ejemplo de la Figura XX 2000-2001-2002, 2001-2002-2003, 2002-2003-2004, etc.

Discussion

Charles Davis Dec 10, 2015:
@ Muriel Thanks, that's a kind thought. I would say it's not worth bothering (not for the sake of points, at any rate), but then again this is not in the glossary, so I suppose it might be worthwhile.
Muriel Vasconcellos (asker) Dec 10, 2015:
@ Charles Since you went to the trouble, please go ahead and post your answer. I will reopen the question and give you the points.
Charles Davis Dec 10, 2015:
Correct I'm glad I refreshed before posting, because I was just about to give you that answer! I'm sure it's right. Here's my reference, for the record:

"Infant Mortality Rates
Since relatively small changes in infant deaths can cause large fluctuations in the infant mortality rate (IMR) from one year to the next, Alaska’s annual IMR is calculated on a five-year moving average. The 1991-1995 five-year average infant mortality rate was 8.3 deaths per 1,000 live births, down from 8.8 deaths per 1,000 live births for 1990-1994. (p. 3) [...]
BIRTHS, INFANT DEATHS, AND 5-YEAR MOVING RATES BY YEAR" (table p. 9: figures for 1987-91, 1998-92, 1989-93, etc., as described in your ST).
http://dhss.alaska.gov/dph/VitalStats/Documents/PDFs/1995/fe...
Muriel Vasconcellos (asker) Dec 10, 2015:
Thanks! It's actually 'moving rates'. I found it in a statistical vocabulary. The next paragraph clued me in:

Se calcula la tasa como se describió anteriormente para cada trienio, y se la asigna al año central 2001,2002,2003, etc. **Esta técnica está relacionada con la de promedios o medianas móviles, de uso frecuente en series temporales y se obtiene un suavizado de las fluctuaciones.** Una desventaja es que “pierde” información a principio y final del período (es decir, no hay valores para el año inicial y final del período), aunque existen algunas alternativas para asignar esos valores.

Proposed translations

+5
2 hrs
Selected

moving rates / rolling rates

Either of these expressions, which are synonymous, could be used. Here is an example of each, one from Alaska and the other from Florida (coincidentally the most widely separated points of the country!):

"Infant Mortality Rates
Since relatively small changes in infant deaths can cause large fluctuations in the infant mortality rate (IMR) from one year to the next, Alaska’s annual IMR is calculated on a five-year moving average. The 1991-1995 five-year average infant mortality rate was 8.3 deaths per 1,000 live births, down from 8.8 deaths per 1,000 live births for 1990-1994. (p. 3) [...]
BIRTHS, INFANT DEATHS, AND 5-YEAR MOVING RATES BY YEAR" (table p. 9: figures for 1987-91, 1998-92, 1989-93, etc., as described in your ST).
http://dhss.alaska.gov/dph/VitalStats/Documents/PDFs/1995/fe...

"Infant Deaths per 1,000 Live Births, 3-Year Rolling Rates"
http://www.floridacharts.com/charts/DataViewer/InfantDeathVi...
Peer comment(s):

agree neilmac : Your links look more convincing...
30 mins
Many thanks, Neil :)
agree Neil Ashby : If only I'd seen this question earlier when I posted refs for http://www.proz.com/kudoz/spanish_to_english/mathematics_sta...
3 hrs
Yes! The things is that it was closed and then reopened (see discussion). Thanks a lot, Neil ;)
agree TranslateThis
4 hrs
Thanks a lot!
agree DLyons
1 day 11 hrs
Thanks, Donal :)
agree Thomas Walker
1 day 13 hrs
Thanks, Tom :)
Something went wrong...
4 KudoZ points awarded for this answer. Comment: "Thanks, Charles!"
9 mins

variable rates

I'm not sure if it will work in the context, but it is a possibility, hence the medium confidence level.
"... denoted as VMR (variable mortality rate), 2. was varied with respect to temperature."
"... .. also documents a variable mortality rate of sepsis, dependent on the number of patients enrolled with systemic inflammatory response syndrome (SIRS) "

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Note added at 10 mins (2015-12-10 09:29:36 GMT)
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"... divided by the population. fb (t) = structural reproduction rate fd (t) = structural mortality rate r2 = structural death rate r3 = variable mortality rate r4..."
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