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Chapter 4: Q.4.121 (page 189)
A value ofclose toindicates that there is a ------ linear relatinship between the variables.
A value of close to indicates that there is a strong linear relationship between the variables.
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More Money, More Beer? The data for per capita income and per capita beer consumption for the states and Washington, D.C., from Exercise 4.77 are 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 in terms of the linear relationship between the mo variables in question.
Birdies and Score. The data from Exercise 4.70 for number of birdies during a tournament and final score for women golfers 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 two variables in question.
One use of the linear correlation coefficient is as a descriptive measure of the strength of the-------- relationshảp between two variables.
In Problems 3-5, answer true or false to each statement. Explain your answers.
4. A horizontal line has no slope.
The -intercept of a line has no effect on the steepness of the line.
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