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Unformatted text preview: .2 )0, L ITIS IP97 Section 1 — Canbolat 9 Fall 2009 II._Based on the 2007 survey of the Omni Power bar sales, we have come up with a multiple regression model for # of Bars Sold vs. Price of a bar and Promotion spending, as shown in the Excel sheet below. (9 marks) W.ma.nMW,M27HW/. m _4 -mu . m M. tum.“ -mm llama“. , A,-,Mmr_mmw_m_.m___ NH... .. . , ,.__.h.....__..mmn a ,, , B -mmC- , D , E , F B ,, Wt ViMultiple Regression: Sales 315. Price 8‘ Promotion 2 , 3 Re reserve Stetésfrcs, at Multiple R ' ' ' ‘ 0.8?0 ,6 RSquare l:i E Adjusted RSquare 0.?42 7 .7‘ Standard Error 638.065 8 Observations 34 E5 10 AHOVA it of SS MS F S: officaoceF 12 Regression 2 394?2?30.??3 19?36355.4 484?? 0.000 13 Residual 31 12620945058 40?12?.312 1:1 Total 33 52093B?7.441 15 15 Coefficients Standard Error tStat P—vaéoe Lower 95% U0 er 95% i? Intercept 5837521 628150 9.293 0.000 4558.400 7118.642 18 (Price 63.21? 6.852 3.1035 0.000 61193 39.242 19 Promotion 3513 0.585 5 2?3 0,000 2216 5011 "HT Using the information on the Excel worksheet above, answer the following questions: (a) Find the value in cell B5 (2 marks). R1: 0.7564 (b) Interpret the value in cell B5 (1 mark). R: is ‘We cos/fitment“ 9% determiner/Tron value (c) Is the regression model as a whole statistically significant? How do you know (2 marks)? k/es. because all .915 +he P» values are 0.000 whim one less “Hun 03 (d) Which independent (explanatory) variables are statistically significant? How do you know (2 marks)? 7:56 ‘Eyfce . ' beCame its 'tStar is the bfiqer (e) What is the regression line equation (2 marks)? lit of Rare Sold : 5337.5)i ~ 53.2\7*PH‘CE +3~‘>“3* pmmh‘on- ...
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