John Coppola 11/ Homework: Ch 8.2 Quality& Assumptions of Linear Regression Scor

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John Coppola 11/ Homework: Ch 8.2 Quality& Assumptions of Linear Regression Score: 0 of 1 pt Instructor-created question Save ERSITY 2 of 6 (0 complete) HW Score: 0%, 0 of 6 pts -Question Help * A market manager of a large supermarket chain used shelf space for pet food to predict weekly sales. The manager collected data on shelf space and weekly sales from a random sample of 12 equal-sized stores. For those data, SSR 19,808 and SST 29,465. Use this information to complete parts (a) through (c) below. ) a. Determine the coefficient of determination, 2 and interpret its meaning ents r®-1(Round to three decimal places as needed.) Interpret the meaning of i? It means that % of the variation in (Round to one decimal place as needed.) b. How useful do you think this regression model is for predicting weekly pet food sales? can be explined by the variation n ess brary ions O A. Iit is not very useful for predicting weekly pet food sales because the coefficient of determination is close to 1 O B. It is not very useful for predicting weekly pet food sales because the coefficient of determination is close to 0 C. it is very useful for predicting weekly pet food sales because the coefficient of determination is close to 0. O D. It is very useful for predicting weekly pet food sales because the coefficient of determi Click to select your answer(s) and then click Check Answer Check Answer Clear All All parts showing 11:09 AM 11/21/201

Explanation / Answer

R2=19.808/29.465=67.22

It states that 67.22% of the variation in pet food sales can be explained by variation in self space.

Ans is D

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