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Seasonal adjustment or deseasonalization is a statistical method for removing the seasonal component of a time series.It is usually done when wanting to analyse the trend, and cyclical deviations from trend, of a time series independently of the seasonal components.
Seasonally adjust the series again with the new seasonal factors. Calculate the final trend and irregular components from the seasonally adjusted series. The method also includes a number of tests, diagnostics and other statistics for evaluating the quality of the seasonal adjustments.
Basic Life Support Emergency Medical Services in the United States are generally identified with Emergency Medical Technicians-Basic (EMT-B). EMT-B is the highest level of healthcare provider that is limited to the BLS protocol; higher medical functions use some or all of the Advanced Cardiac Life Support (ACLS) protocols, in addition to BLS ...
Data released by the federal Bureau of Labor Statistics shows Louisiana’s seasonally adjusted nonfarm employment figure continues to add jobs.
Source: Bureau of Labor Statistics, Current Population Survey [9] Series Id: LNU00000000 Not Seasonally Adjusted Series title: (Unadj.) population Level Labor force status: Civilian noninstitutional population age: 16 years and over Series Id: LNU02000000 Not Seasonally Adjusted Series title: (Unadj.) employment Level
Likewise, seasonal differencing is applied to a seasonal time-series to remove the seasonal component. From the perspective of signal processing, especially the Fourier spectral analysis theory, the trend is a low-frequency part in the spectrum of a series, while the season is a periodic-frequency part.
The author of the Wall Street Journal article, Heather Haddon, didn't reply to my inquiry about why she appeared to use non-seasonally adjusted figures when the adjusted figures were more appropriate.
The seasonally adjusted annual rate (SAAR) is a rate that is adjusted to take into account typical seasonal fluctuations in data and is expressed as an annual total. SAARs are used for data affected by seasonality , when it could be misleading to directly compare different times of the year.