Characteristics of time series, Mathematics

Characteristics of Time Series

Time series has the given characteristics.

a) A long term trend (T) -tendency of the whole series to fall and rise.

b) Seasonal variation (S) - short term periodic fluctuations in values. For example, in middle Asia maize yield is high in November and extremely in March or matatus have better business on Friday and extremely low on Sundays.

c) Cyclical variation (C) - These are medium term changes caused by factors that apply for a while then disappear, and come back again in a repetitive cycle. For illustration, drought hits US every 7 years.

Note that cyclic variation has a longer term than seasonal variation for example, seasonal variation may occur once every year while cyclic variation occurs once every some years.

d) Random residual variation (R) - These are non-recurring random variations for example, war, coup, and fire.

For exact forecasts these aspects are qualified separately that is T, C, S and R from data. It is known as time series or time decomposition analysis

The separate elements are then combined to produce a forecast.

Posted Date: 2/16/2013 7:42:01 AM | Location : United States







Related Discussions:- Characteristics of time series, Assignment Help, Ask Question on Characteristics of time series, Get Answer, Expert's Help, Characteristics of time series Discussions

Write discussion on Characteristics of time series
Your posts are moderated
Related Questions
Binomials, Trinomials and Polynomials which we have seen above are not the only type. We can have them in a single variable say 'x' and of the form x 2 + 4

Calucations of gradients find f Graph some level curve f=const. f=9x^2 = 4y^2

In order to compute the inequalities of the form   where n 1 , n 2 , ....... , n k , m 1 , m 2 , ....... , m p are natural and real numbers and a 1 , a 2 , ... , a k ,


what is algebra

what is the derivatives of y=u/5+7 and u=5x-35 using the chain rule?


Factoring By Grouping It is a method that isn't utilized all that frequently, but while it can be used it can be somewhat useful. Factoring by grouping can be nice, however it

What do you need to multiply 30 by to get 1500? This will give you the top edge length of the rectangle. Can you then figure out what must go below the 30 in order to get the area

#questi0+50x1-60-60x0+10on..