stats_stat_correlation
  Returns the Pearson correlation coefficient of two data sets
  
 
  説明
  
   float stats_stat_correlation(array $arr1, array $arr2)
  
  
 
  パラメータ
  
   
    
     - 
arr1 
     - 
      
       The first array
      
      
    
    
     - 
arr2 
     - 
      
       The second array
      
      
    
   
  
  
 
  戻り値
  
   Returns the Pearson correlation coefficient between arr1 and arr2,
   or false on failure.