Statistics & Econometrics Formulas, Cheat Sheet of Statistics

Download Statistics & Econometrics Formulas and more Cheat Sheet Statistics in PDF only on Docsity! Media: X Som M(x) - 2 ; Dispersia (Varaata) - Ty” sau TX) = ate Miboteren medic pitratiod: Tx Sau TX) = {akg Coeficentul de omageni tate Pearson: OV y= % too {froprieketi ate Propretiti ole dispersiei 4, H{c)= 4. De) =0 2 ACH =c HWY 2. D(eX)-¢ DY b. THKEY) = HOGI) 5. B(K+¥) -B(K)+D(Y), daca XY - imdepencente 4 MQCY) = Mi: H{Y) DIKEY) = DOX)}+ DEV) 200K), dau % XY ~independente doce Xe -dependente DIK+Y-2) - Dix) ely) +D(2)+ Zooey Hetode de amaliza a legit dintre 2 vaviabile sia * Neparametrice « 2 1. Coarianta tovlsyy) sam Sayy = (KY) MODY) 4 D(Y)=H (K})-{100) ‘ 22K) OY) N 2.Coefisental de eocapic Limacd= fy am P,y) - ay * Porometrice YopatPexit |, (estimare. partneh regres) gs, = SP By = HUY) Ba HLH) ge Pry (docé 44 Singular snndepoudenti) Legi de probabititate discrete oa Homent de ordin 1 / medio. E(X) = 2 Xj Pi Homent de ordin i: E(x‘) PK Pi > Homent coma cle ordin. 2 [vacianta: Th =€ [xi- Eb] pi