When measurements are based upon sample surveys over time, data at different points in time may be different due to different reasons. The most obvious reason is that the underlying phenomenon has changed.
www.zonalatina.com/Zldata15.htm www.zonalatina.com/Zldata15.htm
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Trend estimation - Wikipedia, the free encyclopedia
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Trend estimation is a statistical technique to aid interpretation of data. When a series of measurements of a process are treated as a time series, then the application of trend estimation can be used...
en.wikipedia.org/wiki/Trend_estimation
It is true that the use of data trending (versus level limits) overcomes certain problems or complexities that have plagued the oil analysis field for years. This works best when all other variables are locked down such as:
www.oilanalysis.com/article_detail.asp?articleid=1075
This chapter examines the problems of dealing with trending type data when there is uncertainty over whether or not we really have unit roots in the data. This uncertainty is practical - for many macroeconomic and financial variables theory does not imply a unit root in the data however unit root tests fail to reject.
ideas.repec.org/h/eee/ecofch/1-11.html
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However, with attribute data, care must be taken in implementing SPC to avoid only an illusion of change. ... This example illustrates the importance of trending attribute data either by accumulating the data or by using a CUSUM chart.
www.variation.com/techlib/as-4.html
Web metrics and analytics are essential to a successful web strategy. Web stats are an essential ingredient in business score carding. Netropole uses web trends to deliver reports on hits, ecommerce metrics, advertising effectiveness, and program management. ... Knowledge Can Be a Powerful Thing ... Who is Coming to Your Website,
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Can someone explain the array function to me. And, what is the difference of trending data using the standard trend function, and adding an array to the trend? Thanks, Angie;
www.mackb.com/Uwe/Forum.aspx/excel/3374/Array-and-trend... www.mackb.com/Uwe/Forum.aspx/excel/3374/Array-and-trending-data
 ; View Screen: The View screen gives a snapshot picture of the key performance indicator (KPI). Charts display supporting data, while text details the criteria and justification for each KPI.
dashboardspy.wordpress.com/2006/03/06/showing-trending-... dashboardspy.wordpress.com/2006/03/06/showing-trending-data-on-dashboards/
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