Data weight averaging












2












$begingroup$


say I have 2 datasets and need to get an average but with a weight based on the number of students.



school 1 = 98.1 . (50 students)
School 2 = 95.4 . (169 students)



How would i get the average of both with a weighted average reflected the average of the student totals i think it would be around = 96.ish



thanks for any insight!






dataset







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$endgroup$

















    2












    $begingroup$


    say I have 2 datasets and need to get an average but with a weight based on the number of students.



    school 1 = 98.1 . (50 students)
    School 2 = 95.4 . (169 students)



    How would i get the average of both with a weighted average reflected the average of the student totals i think it would be around = 96.ish



    thanks for any insight!






    dataset







    share|improve this question







    New contributor




    Colin f is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







    $endgroup$















      2












      2








      2





      $begingroup$


      say I have 2 datasets and need to get an average but with a weight based on the number of students.



      school 1 = 98.1 . (50 students)
      School 2 = 95.4 . (169 students)



      How would i get the average of both with a weighted average reflected the average of the student totals i think it would be around = 96.ish



      thanks for any insight!






      dataset







      share|improve this question







      New contributor




      Colin f is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.







      $endgroup$




      say I have 2 datasets and need to get an average but with a weight based on the number of students.



      school 1 = 98.1 . (50 students)
      School 2 = 95.4 . (169 students)



      How would i get the average of both with a weighted average reflected the average of the student totals i think it would be around = 96.ish



      thanks for any insight!






      dataset




      dataset






      share|improve this question







      New contributor




      Colin f is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      Colin f is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question






      New contributor




      Colin f is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 12 hours ago









      Colin fColin f

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      132




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      New contributor





      Colin f is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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          $begingroup$

          There are 50 + 169 = 219 students in total.
          The weights are 50/119 = 0.23 and 169/219 = 0.77 respectively.



          Hence, 0.23*98.1 + 0.77*95.4 = 96.021






          share|improve this answer









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            $begingroup$

            There are 50 + 169 = 219 students in total.
            The weights are 50/119 = 0.23 and 169/219 = 0.77 respectively.



            Hence, 0.23*98.1 + 0.77*95.4 = 96.021






            share|improve this answer









            $endgroup$


















              1












              $begingroup$

              There are 50 + 169 = 219 students in total.
              The weights are 50/119 = 0.23 and 169/219 = 0.77 respectively.



              Hence, 0.23*98.1 + 0.77*95.4 = 96.021






              share|improve this answer









              $endgroup$
















                1












                1








                1





                $begingroup$

                There are 50 + 169 = 219 students in total.
                The weights are 50/119 = 0.23 and 169/219 = 0.77 respectively.



                Hence, 0.23*98.1 + 0.77*95.4 = 96.021






                share|improve this answer









                $endgroup$



                There are 50 + 169 = 219 students in total.
                The weights are 50/119 = 0.23 and 169/219 = 0.77 respectively.



                Hence, 0.23*98.1 + 0.77*95.4 = 96.021







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 12 hours ago









                Christos KaratsalosChristos Karatsalos

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                49718






















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