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please can you write the all formulas of Statistics....plz

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srry sum sybolzzz cant be typed..!

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Unless otherwise noted, these formulas assumesimple random sampling.

  • Sample mean =x= ( Σ xi) / n
  • Sample standard deviation = s = sqrt [ Σ ( xi-x)2/ ( n - 1 ) ]
  • Sample variance = s2= Σ ( xi-x)2/ ( n - 1 )
  • Variance of sample proportion = sp2= pq / (n - 1)
  • Pooled sample proportion = p = (p1* n1+ p2* n2) / (n1+ n2)
  • Pooled sample standard deviation = sp= sqrt [ (n1- 1) * s12+ (n2- 1) * s22] / (n1+ n2- 2) ]
  • Sample correlation coefficient = r = [ 1 / (n - 1) ] * Σ { [ (xi-x) / sx] * [ (yi-y) / sy] }
  • HOPE THIS HELPS :)
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