Withleastsquaresforthebivariatelinearmodel,equation(6.1)statesthat 0 = y 1x. (a) Usingthisformula,show thatanalternativeexpressionforthefittedlineis (i y) = 1(xi x). (b)

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Withleastsquaresforthebivariatelinearmodel,equation(6.1)statesthat ˆβ0 = y − ˆβ1x.

(a) Usingthisformula,show thatanalternativeexpressionforthefittedlineis (ˆμi − y) =

ˆβ1(xi − x).

(b) Fordataon y = final exam score and x = midterm score,suppose r =

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