## Introduction to Time Series

The statistical data is recorded with its time of occurrence is called a time series. The yearly output of wheat... Click here to read more

From basic to higher mathematics

The statistical data is recorded with its time of occurrence is called a time series. The yearly output of wheat... Click here to read more

The factors that are responsible to bring about changes in a time series, also called the components of time series,... Click here to read more

The object of the time series analysis is to identify the magnitude and direction of trend, to estimate the effect... Click here to read more

A number of different methods are available to estimate the trend; however, suitability of these methods largely depends on the... Click here to read more

It is familiar concept, briefly described for drawing frequency curves. In case of a time series a scatter diagram of... Click here to read more

Merits: This method is very simple and easy to understand. It is applicable for linear and non-linear trends. It gives... Click here to read more

This method is also simple and relatively objective than the free hand method. The data is divided in two equal... Click here to read more

Merits: This method is very simple and easy to understandable and also it does not require much of calculations. Demerits:... Click here to read more

Suppose that there are times periods denoted by and the corresponding values of variable are . First of all we... Click here to read more

Merits: Moving averages can be used for measuring the trend of any series. The method is applicable for linear as... Click here to read more

Using the multiplicative model i.e., the ratio detrended series may be obtained by dividing the actual observations by the corresponding... Click here to read more

Using the additive model i.e. , the de-trended series may be obtained by subtracting the trend values from the actual... Click here to read more

The long term cyclical movements in a time series can be studied more or less in the same way as... Click here to read more

Mathematical curve fitting is probably the most objective method of isolating trend. This method enables us to obtain precise estimates... Click here to read more