Extra exercises chapter 3 statistics i, Apuntes de Estadística

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(A) Corretarion fazed on Hna table cade wee ly ulsits de cmema alo 1 the Aester a) margimals table) X |o 4 ¡EE da m= 40 > 3 y 0-5 +1-342-2 b) A A EY 07.5 442.34 22.2 — 40- (0.7) mE 9 20.68 Similariy we get ¡Dedos sy = 0.25 5 a a Prog mAs c) covar tance Sxy = A +2-0-0 + 242, = 4 Xx Y Jrequence) 4-10 .0.F+:0.3 = 43 = 0.24 — 9x4 = 3 3 corre le+tom Cog) -— = o 0.53 0.08 10.25 a So here exists sowe (liodewate >) limea a rela bionshup behweem x and y. E : Zrii > 0: 0-4 + 0-44 + 4:02 +4e4* O val comrelatiom based om compte: 7 eS os work experieuce A = Lucome (cu L£housends E) The %auwple ceu be represeut ed as OA! 3 4 2 ye AS A 4. + y OR AO y a 0) m- 4 Xx == Er O a A t5 62. Aaa dra 1 0 89, 3 3 da 1.55 S4 = 0.1474 les Yi m— as Par RR AS b) Figes YA u=] - y ASS 14.9- Y-(4.+5) (A ds es => 2 o PB 2 0.04 AS asas A (oraelarhion op OST? Mens Hist Lhere exists etromg pon twe limeao DA between gears oL. y dio E and Lucome LAR