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Mean


                                             Measures of Central              Median
                                                  Tendency

                                                                               Mode



              Mean
              Mean is an essential concept in statistics. The mean is the average or the most common value in a group of numbers.


                                    MEAN                      Direct Method
                                    (Individual Series):

                                                             1.   Find ∑x by adding all the values
                                        Wages
                                          (x)                             ∑x = 1500

                                          100
                                                             2.   Find total number of items (N)
                                          200
                                          300                       N=5

                                          400
                                                             3.   Apply formula
                                          500

                                       ∑ x = 1500                ∑  x  1500
                                                              X =    =      =  300
                                                                  N      5



                                     MEAN (Discrete Series):                   Direct Method
                                     (Frequency Array)

                                       Wages       f       fx                 1.  Find fx
                                         (X)

                                                                              2.  Find ∑ fx and ∑ f
                                         100       2       200

                                         200       1       200                3.  Apply formula

                                         300       3       900                    ∑  fx
                                                                              X =
                                         400       3      1200                    ∑  f

                                         500       1       500
                                                                              =  3000
                                                ∑f =     ∑fx=                    10
                                                10       3000
                                                                              =  300






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