about statstics

Asked by gappus | 9th Jan, 2010, 12:10: PM

Expert Answer:

x

f

Σfixi

10 4 40
30 24 720
50 28 1400
70 16 1120
90 8 720
Sum 80 4000

 

Arithmetic Mean = Σfixi / Σf= 4000/ 80 = 50

 

 

Answered by  | 9th Jan, 2010, 02:54: PM

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