foodisgood2569 foodisgood2569
  • 11-03-2024
  • Mathematics
contestada

If ∑(xi−5)=9 and ∑(xi−5)² = 45 then the standard deviation of the 9 items x1,x2,.....,x9 is
A. 3
B. 9
C. 4
D. 2

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