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(b-/t Woy ? IIT STUART SCHOOL OF MANAGEMENT BUS David Richardson FALL 2018 473 Market Research MIDTERM EXAMINATION ,> lnstructions: This must be strictly your own work. Calculators are not permitted. Show your calculations. This is a closed book exam. You will have 80 minutes to complete the test. 1". (30 points) Quiz Grades for Alice are given in the column below. Alice 19" L7 14. t7 20, L7 14' lY' l'1 :l ' l)' 17' /) , t) , tt, !7, "t{) t-/ Calculate the mean, media/mode,lariance, standard deviation, and standard deviation of the mean of the scores, nssbm#-tnese are a sample from a potentially infinite pool of a. results X = tSJ/? > 17 '/ S= I7, = Z. L-/'-- kt" nJ, , ,r/ (ii o,=LL -t)l = (y? t_,, ) b. J JnvL 1) ," *Y llz -ilJ/ha ) o?7 t o !71-o fTrct t)/{ =y *,U The Professor believes that a student who has mastered the material will score on average s / x v - tE ::n:; :: ::::1.T: #fi ff.:lli:.i,i,il:'"-' "::"'H.[:"""'' : -tt" -caj_: !(,* _lv-4,Y ue /J;) / r 4 4 ) ) l/ty /gl.c. k ,.oy 4t",i ( L c. S/hich of the variables plays the most significant role in determining sales? Hou,do you know? - J/ i12.y-71 XFf'; rL rcL r>iq ? Jlfy. e.7? tLiq ^F"ftu)U/eLtr z\,?l t X UL4 p-;u * 3 "71 l, 2v I x /Ueu-r;. / J,J &^U 75r,7J7 X [t"y)ttu-t + Vy>.r.{zlx Junn.n Is collinearity a problem in this regression? How do you know? What problems could multicollinearity cause if present? How would we correct for it? ft yauk o,J afu h ytcl e! l- a,i"L +i"J hJ lorc lh'y "!, l,yj,z anJ &.y pV lX[ "L t lg rr,r-l
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