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Chapter 4: Q. 1 (page 192)
For a linear equation, identify the
a. independent variable.
b. dependent variable.
c. slope.
d. intercept.
The answers for the subparts have been given below.
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Home Size and Value. The data from Exercise 4.74 for home size (in square feet) and assessed value (in thousands of dollars) for the same homes as in Exercise 4.157 are on the WeissStats site.
a. decide whether use of the linear correlation coefficient as a descriptive measure for the data is appropriate. If so, then also do parts (b) and (c).
b. obtain the linear correlation coefficient.
c. interpret the value of in terms of the linear relationship between the mo variables in question.
Gas Gurzlers. The data for gas mileage and engine displacement for vehicles from Exercise 4.78 are provided on the WeissStats site.
a. decide whether the use of the linear correlation coefficient as a descriptive measure for the data is appropriate. If so, then also do parts (b) and (c).
b. obtain the linear correlation coefficient.
c. interpret the value of r in terms of the linear relationship between the mo variables in question.
For regression analysis, and .
a. Obtain and interpret the coefficient of determination.
b. Determine SSE :
7. Identify one use of a regression equation.
For which of the following sets of data points can you reasonably determine a regression line? Explain your answer.
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