An auto manufacturing company wishes to investigate how the price of one of its car models depreciates with age. The research department took a sample of 10 cars of this model and collected the following information on the ages (in years) and the prices (in hundreds of dollars). 6. Age, x Price, y 3 9. 3 2 6. 8. 4 99 21 94 140 30 38 41 15 37 80 Note: Ex=52 , Ey =595 , Ex = 316 , ² = 50697 , Exy =2326 %3D a) Draw a scatter plot for this data. b) Would you expect a positive or a negative relationship between the variables x and y? Explain. c) Calculate the linear correlation coefficient, r. d) Calculate the line-of-best-fit (regression line) AND add it to your scatter plot. e) Estimate the price of a 7 year old car of this model.
An auto manufacturing company wishes to investigate how the price of one of its car models depreciates with age. The research department took a sample of 10 cars of this model and collected the following information on the ages (in years) and the prices (in hundreds of dollars). 6. Age, x Price, y 3 9. 3 2 6. 8. 4 99 21 94 140 30 38 41 15 37 80 Note: Ex=52 , Ey =595 , Ex = 316 , ² = 50697 , Exy =2326 %3D a) Draw a scatter plot for this data. b) Would you expect a positive or a negative relationship between the variables x and y? Explain. c) Calculate the linear correlation coefficient, r. d) Calculate the line-of-best-fit (regression line) AND add it to your scatter plot. e) Estimate the price of a 7 year old car of this model.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 38HP
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