Contents
        
           Meaning of correlation
        
           What is partial correlation?
        
           Properties of partial correlation coefficient
        
           Co-efficient of Partial determination
        
           Regression and Multiple Regression equation
        
           Co-efficient of determination
        
           What is an error?
        
           Determining F-ratio
        
           Calculating Co-efficient of Multiple
        
           Auto Correlation
        
           Preferences
                                                                                                2
          Meaning of correlation
          Relation or connection between two or more things 
          (in general sense)
           Interdependence of variable quantities
          (statistically)
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             Order of correlation
          Zero order correlation                 12, 13, 23, ………
         First order correlation
                                                       ,       ,        , ………
                                                 12.3 13.2 23.1
         Second order correlation
                                                          ,          , ………
                                                 12.34 13.24
                                                                                              4
        For Zero order correlation,
                         =                       12− 1 2
                     12 
                                    2               2       2      
                                   1 −      1              2 −     2
                                                    2
                      1                          13− 1 3
                      3
                     =              2                       2
                                    1 −     1       2     3 −     3
                                                  An
                                                    2
                                           −    d
                      2                  23   2 3
                      3             2               2       2              2
                     =              2 −     2              3 −     3
                                                                                         5
       What is partial correlation co-fficient?
        Relationship between two variables keeping the
       other variable constant/fixed
           •
           Relation between X1 and X2 keeping X3
           constant is denoted by:
           • Similarly, means relation between X1 and
           X3 keeping X2 and so on
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