Question 7: In a study of the relation between the expanding budget of advertisement on a specific product (X) in thousands of pounds and the quantity sold (Y), in tons, of a product. A sample of the advertising budget and the quantity sold in eight successive months is drawn from one of the companies which are dealing in such a product and the following information is obtained. ΣΧ-130 , ΣΧ.- 1850 i=1 i=1 EY; =110 Σ1650 i=1 i=1 The value of the Y-intercept (a) = 9.395 Using the previous information calculate 1) The correlation coefficient (r) and the determinant coefficient ( R²). Comment on the results. 2) Find the regression line of Y on X and interpret the meaning of its intercept and regression coefficient. 3) Predict the number of tones sold from this product if the expended advertising budget in one month is 25 thousand pounds

Question 7: In a study of the relation between the expanding budget of advertisement on a specific product (X) in thousands of pounds and the quantity sold (Y), in tons, of a product. A sample of the advertising budget and the quantity sold in eight successive months is drawn from one of the companies which are dealing in such a product and the following information is obtained. ΣΧ-130 , ΣΧ.- 1850 i=1 i=1 EY; =110 Σ1650 i=1 i=1 The value of the Y-intercept (a) = 9.395 Using the previous information calculate 1) The correlation coefficient (r) and the determinant coefficient ( R²). Comment on the results. 2) Find the regression line of Y on X and interpret the meaning of its intercept and regression coefficient. 3) Predict the number of tones sold from this product if the expended advertising budget in one month is 25 thousand pounds

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter11: Topics From Analytic Geometry

Section: Chapter Questions

Problem 47RE

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