Question

Consider the following data for two variables, x and y. Excel File: x 2 3 4 5 7 7 7 8 9 y 4 5 4 6 4 6 9 5 11 a. Choose the correct scatter diagram with x and y. A. B. C. D. The correct scatter diagram is - Select your answer - A B C D. Does there appear to be a linear relationship between x and y? Explain. The scatter diagram - Select your answer - does not show shows some evidence of a possible linear relationship. b. Develop the estimated regression equation relating x and y. Save "predicted" and "residuals" (to decimals). ŷ = blank + blank x c. Choose the correct scatter diagram of the standardized residuals versus ŷ for the estimated regression equation developed in part (b). A. B. C. D. The correct scatter diagram is - Select your answer - A B C D. Do the model assumptions appear to be satisfied? Explain. The standardized residual plot indicates that the constant variance assumption - Select your answer - is not is satisfied. d. Perform a logarithmic transformation (under Data/Transform Data/Log10) on the dependent variable y. Develop an estimated regression equation using the transformed dependent variable (to decimals). log10ŷ = blank + blank x

          Consider the following data for two variables, x and y.

Excel File:
x
2
3
4
5
7
7
7
8
9
y
4
5
4
6
4
6
9
5
11

a. Choose the correct scatter diagram with x and y.

A.
B.
C.
D.

The correct scatter diagram is - Select your answer - A B C D.

Does there appear to be a linear relationship between x and y? Explain.

The scatter diagram - Select your answer - does not show shows some evidence of a possible linear relationship.

b. Develop the estimated regression equation relating x and y. Save "predicted" and "residuals" (to decimals).

ŷ = blank + blank x

c. Choose the correct scatter diagram of the standardized residuals versus ŷ for the estimated regression equation developed in part (b).

A.
B.
C.
D.

The correct scatter diagram is - Select your answer - A B C D.

Do the model assumptions appear to be satisfied? Explain.

The standardized residual plot indicates that the constant variance assumption - Select your answer - is not is satisfied.

d. Perform a logarithmic transformation (under Data/Transform Data/Log10) on the dependent variable y. Develop an estimated regression equation using the transformed dependent variable (to decimals).

log10ŷ = blank + blank x

Added by Calvin J.

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