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Running head: ANALYSIS AND DISCUSSION QUESTIONANALYSIS AND DISCUSSION QUESTIONStudents nameCourse titleJune 7, 20181ANALYSIS AND DISCUSSION QUESTION2Autocorrelation instead of autocovarianceThe reason why we do use autocorrelation instead of autocovariance in a situation, whichrequires examination of a time series, is that time series data are in most cases challenging. Thischallenge is because of the fact that the data can change if we consider the linear programmingassumptions. If such cases occur when there is need to eliminate such errors and create aconsistent data.If autocovariance were used then, the most likely result would be invalid as its variablescan change as time progresses. In this case, autocorrelation would be the most applicable in caseof a stationary time series since its properties allow the data not to change as the time progress.(Brockwell, 2009)Challenges of text analysisText analysis is a part of the larger text mining which involves the process of extracting themost important part of a text document. Text mining is a highly valued area. Text analysis fallsin the second group of text mining methods, which entails the larger Natural LanguageProcessing. Several tools are used in this phase in order to help find with minimal timeconsumption what is relevant in the web pages. Such tools include CHESS, CINDOR, and DRLINK among other tools. Each of the tools utilizes its own techniques for an effective textanalysis. Once the ...


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