Question

4).36 21) What is the proper conclusion based A) There is evidence (at α-.05) of downward non- Bi tenino ovideu aber of bidderis efal for predicting aship between auction price (y) and number of bidders (x). of upward non-linear relationship α-05) u auction price (y) and number of bidders (x). price (y). auction C) Reject Ho at α-05, the model is not useful for predicting auction price ) There is evidence (at a- .05) of upward non-linear relationship between price () and number of bidders (x). type of electioan naiona varnts to model voter turnout() in a precinct as a function of type of election, national or state. Write a model for turnou A) Ey)or mean voter turnout, Ev), as a function of type of election. B2x2, where x voter turnout B) here x1 - 1 if national, 0 if not and x2 - 1 if state, 0 if not C) E()-β0 + β 1 x, where x-voter turnout D) E()-p0 + β1 x, where x-1 if national, o if state 23) It is desired to build a regression model to predict y - the sales price of a single family home, based on the neighborhood the home is located in. The goal is to compare the prices of homes that are located in four different neighborhoods. Which regression model should be built? A) E(y) s β0 + β1 x1, where x1 is a qualitative variable that describes the four neighborhoods B) E(y) - po+ B1x1 + B2x12, where x1 is a qualitative variable that describes the four neighborhoods C) E(y)-β0 + β1 x 1 + β2x2 + β3x3 + β4x4, where x1-x4 are qualitative variables that describe the four neighborhoods. D) E(y)-Po + β1x1 +P2x2 + β3x3, where x1-x3 are qualitative variables that describ the four neighborhoods. 10

Answer 1