Foirmlí Bunúsacha Dóchúlachta

 

Raon Dóchúlachta

0 ≤ P ( A ) ≤ 1

Riail Imeachtaí Comhlántacha

P ( A C ) + P ( A ) = 1

Riail an Bhreiseáin

P (A∪B) = P (A) + P (B) - P (A∩B)

Imeachtaí Disjoint

Tá Imeachtaí A agus B dícheangailte iff

P (A∩B) = 0

Dóchúlacht Coinníollach

P (A | B) = P (A∩B) / P (B)

Foirmle Bayes

P (A | B) = P (B | A) ⋅ P (A) / P (B)

Imeachtaí Neamhspleácha

Tá Imeachtaí A agus B neamhspleách iff

P (A∩B) = P (A) ⋅ P (B)

Feidhm Dáileacháin Charnach

F X ( x ) = P ( X ≤ x )

Feidhm Mais Dóchúlachta

suim (i = 1..n, P (X = x (i)) = 1

Feidhm Dlús Dóchúlachta

fX (x) = dFX (x) / dx

FX (x) = dhílis (-inf..x, fX (y) * dy)

FX (x) = suim (k = 1..x, P (X = k))

P (a <= X <= b) = dhílis (a..b, fX (x) * dx)

dhílis (-inf..inf, fX (x) * dx) = 1

 

Comhchathair

Cox (X, Y) = E (X-ux) (Y-uy) = E (XY) - ux * uy

Comhghaol

corr (X, Y) = Cov (X, Y) / (Std (X) * Std (Y))

 

Bernoulli: 0-teip 1-rath

Geoiméadrach: 0-teip 1-rath

Hypergeometric: Tógtar N réad le rudaí rathúla K, n réada.

 

 

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