Time Series Analysis
University of Phoenix
Professor Dr. Anthony Matias
QRB 501
Thursday, April 01, 2010
Time series is a very important part of Quantitative reasoning and Statistics. Time series is a collection of recorded everyplace a issue of while --- weekly, monthly, quarterly, or formly (Lind, Marchal & international ampere; Wa wherefore p. 651). The lesson personas Microsoft Corporation as an example of epoch series. It measures its sales by the quarter since 1985 and its linear growth. Time series also deals with the use of data to forecast future events. This paper will smelling at the main components of a time series and then it will examine some of the techniques used in analyzing data.
There are four major components to a time series: the course of study, the cyclical variation, the seasonal variation, and the irregular variation. The secular ignore of a time series deals with the long term trends of sales, employment, decline prices, and other parentage. The secular trend follows various patterns with some base steadily upwards, while some trends will follow a declining path. Still some trends will stay the same oer time.
In the cyclical variation component, a true business cycle will have a period of prosperity followed by periods of recession, depression, and eventual recovery. Cyclical variation unremarkably consists of sizable fluctuations unfolding over more than one year which are usually above and below the secular trend. During a time of prosperity, the Dow Jones Industrial Average and many other business are above their long-term trend lines. In a period of depression they are below their long-term trend lines.
In the third component of a time series sales and production will follow a seasonal trend. This seasonal trends form a pattern that seems to recur itself year after year. Most of all businesses and companies have to...
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