The data referred to in this question were collected from several sales districts across the country.The data represent sales for a maker of asphalt roofing shingles. Information on the followingvariables is available:SalesSales from last year in thousands of squaresExpendituresPromotional expenditures in thousands of dollarsAccountsNumber of active accountsCompeting BrandsNumber of competing brands producing equivalent or similar productsDistrict PotentialA coded indicator of the potential of the district(higher score = better potential)Partial SPSS regression output of a multiple regression model with sales as the response variableand the other four variables as predictor variables is given below:ANOVASum ofModelSquaresdfMean SquareFSig.Regression176777.1444194.265479.099.000Residual1937.1372192.245Total178714.225CoefficientsUnstandardizedStandardizedCoefficientsCoefficientsModelStd. ErrorBetatSig.(Constant)Promotional Expenditures1178.32012.96013.759.000001.8071.0810391.672.10944Number of Active Accounts3.318163.55820.368.00000Number of Competing Brands-21.185.788-647-26.887.00000District Potential.325468018.69449544M Notifications91M InboxCalendarTo Do 9. Which of the four explanatory variables seems to be the least significant in the model?A) ExpendituresCompeting BrandsDistrict PotentialC)B) AccountsD)10. What is a 95% confidence interval for the coefficient of promotional expenditures?A) (-0.441, 4.055)C)(-0.053, 3.667)B) (-0.312, 3.926)11. An F test for the two coefficients of promotional expenditures and district potential isperformed. The hypotheses are: H: 0 = 0= 0 versus H: at least one of the is not 0.The F statistic for this test is 1.482 with 2 and 21 degrees of freedom. What can we sayabout the P-value for this test?D)(0.726, 2.888)0.05 0.1091M InboxCalendarTo DoNotifications

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Description: The data referred to in this question were collected from several sales districts across the country.The data represent sales for a maker of asphalt roofing shingles. Information on the followingvariables is available:SalesSales from last year in th

Decision rule : Higher p value indicates that (independent or explanatory) variable is to be least…

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9. Which of the four explanatory variables seems to be the least significant in the model? A) Expenditures Competing Brands District Potential C) B) Accounts D) 10. What is a 95% confidence interval for the coefficient of promotional expenditures? A) (-0.441, 4.055) B) (-0.312, 3.926) 11. An F test for the two coefficients of promotional expenditures and district potential is performed. The hypotheses are: H: 0, = 0.= 0 versus H: at least one of the is not 0. The F statistic for this test is 1.482 with 2 and 21 degrees of freedom. What can we say C) (-0.053, 3.667) D) (0.726, 2.888) about the P-value for this test? 0.05< P-value <0.10 D) P-value >0.10 A) P-value <0.025 C) B) 0.025 < P-value < 0.05

9. Which of the four explanatory variables seems to be the least significant in the model? A) Expenditures Competing Brands District Potential C) B) Accounts D) 10. What is a 95% confidence interval for the coefficient of promotional expenditures? A) (-0.441, 4.055) B) (-0.312, 3.926) 11. An F test for the two coefficients of promotional expenditures and district potential is performed. The hypotheses are: H: 0, = 0.= 0 versus H: at least one of the is not 0. The F statistic for this test is 1.482 with 2 and 21 degrees of freedom. What can we say C) (-0.053, 3.667) D) (0.726, 2.888) about the P-value for this test? 0.05< P-value <0.10 D) P-value >0.10 A) P-value <0.025 C) B) 0.025 < P-value < 0.05

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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