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5
     1.
2.




     3.




     4.




     5.


2.2


3.
          2
1.


2.
1.                   (Arithmetic mean)




         x1 , x2 , x3 , …,xN        N




                                               14 ,
16 , 14 , 17 , 16 , 14 , 18 , 17



                                     1        17


                                          3
15.75


        8                    1        9




                15.89


3       11 13 11 14 13 11 15 14
            14 16 14 17 16 14 18 17




    3
12.75

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สถิติเบื้องต้น

  • 1. - - 1. 2 1.1 1.2 2. 2.1 2.1.1 2.1.2 5 1.
  • 2. 2. 3. 4. 5. 2.2 3. 2 1. 2.
  • 3. 1. (Arithmetic mean) x1 , x2 , x3 , …,xN N 14 , 16 , 14 , 17 , 16 , 14 , 18 , 17 1 17 3
  • 4. 15.75 8 1 9 15.89 3 11 13 11 14 13 11 15 14 14 16 14 17 16 14 18 17 3 12.75