Question

A random sample of 8 applicants for a certain foreign job is selected. The number of years that these applicants have studied French in high school or university, X, and the mark which they obtained in a proficiency test in French, Y, are recorded. The following information is given: ∑X =32 ∑Y =528 ∑XY=2136 ∑X2 =130 ∑Y2 =34872 Fitting a regression line, which of the following statements is incorrect?


A.b₁ = 12


B.b₀ = 18


C.Mean of X values = 4 Mean of Y values = 66


D.Ŷ = 12+18Xi


E.The predicted mark obtained if an applicant studied French for two years is 42.