7. Conclusion 



This paper has outlined some procedures to follow to analyze and 

 predict useful frequency relationships in measured multiple input/output 

 data. Many important engineering applications can be solved with the help 

 of these techniques. To interpret results properly, since the data are 

 statistical in nature and available records are limited in both duration 

 and number, these applications also require appropriate statistical error 

 analysis of any measured results as discussed in I 7| . Physical interpre- 

 tations for all of these concepts with engineering examples and extended 

 details for recommended data analysis procedures will soon be available 

 in a new book 8 . 



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