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[http://www.tylervigen.com/spurious-correlations Spurious Correlations] mostly shows that if two things are trending in one direction and are checked for correlation they will show a very significant correlation. Practice effect is a subset. Another is one instance of an event increases the chances of the same event happening soon after. Economists suggest unit root.
 
[http://www.tylervigen.com/spurious-correlations Spurious Correlations] mostly shows that if two things are trending in one direction and are checked for correlation they will show a very significant correlation. Practice effect is a subset. Another is one instance of an event increases the chances of the same event happening soon after. Economists suggest unit root.
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Effects on target variable from outside known variables. In non time series this is compensated for with RCT
    
Lag. What if eating pizza on one day causes heartburn the next?  
 
Lag. What if eating pizza on one day causes heartburn the next?  
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Types of data. [Exercised] is an event with specific occurrence moment and length while [tired] is a vaguer value user could use to try to describe feelings past 4 hours.     
 
Types of data. [Exercised] is an event with specific occurrence moment and length while [tired] is a vaguer value user could use to try to describe feelings past 4 hours.     
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All the [[Issues with Self Report]] .     
    
=== What to expect from the complete analysis tool ===
 
=== What to expect from the complete analysis tool ===
User without experience in statistical analysis will not be able to tell the difference between correctly computed correlations and poorly computed ones. However, a genuinely complete analysis produces graphs which should include most of the following:   
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User without experience in statistical analysis will not be able to tell the difference between correctly computed correlations and poorly computed ones. However, a genuinely complete analysis produces plots which should include at least some of the following:   
    
Interpolation for irregular time series.   
 
Interpolation for irregular time series.   
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