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Chapter 4: Q. 17 (page 192)

A value of rclose to -1suggests a strong------ linear relationship between the variables.

Short Answer

Expert verified

A value of rclose to -1indicates that the variables have a strong negative linear connection.

Step by step solution

01

Given Information

To determine the blank in the given statement.

02

Explanation

The variables show a strong negative linear association when the correlation value approaches -1.That is, there is a negative linear connection between the variables xand y. The variables have such a strong positive linear association if the correlations value is close to one. That is, the variables xand yare perfectly connected in a positive linear way.

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Most popular questions from this chapter

a) Plot the data points and the first linear equation on one graph and the data points and the second linear equation on another.

(b) Construct tables for x,y,e,e2,y^

(c) Determine which line fits the data points better according to the least-square criterion.

Corvette Prices. In Exercise 4.59. you determined a regression equation that can be used to predict the price of a Corvette, given its age.

a. Should that regression equation be used to predict the price of a 4-year-old Corvette? a 10-year-old Corvette? Explain your answers.

b. For which ages is the use of the regression equation to predict price reasonable?

PCBs and Pelicans. The data on shell thickness and concentration of PCBs for 60Anacapa pelican eggs from Exercise 4.76 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 r in terms of the linear relationship between the two variables in question.

In Problems 3-5, answer true or false to each statement. Explain your answers.

If a line has a positive slope, y-values on the line decrease as thex-values decrease.

In Exercise 4.5, we give linear equations. For each equation,

a. find the y-intercept and slope.

b. determine whether the line slopes upward, slopes downward, or is horizontal, without graphing the equation.

c. use two points to graph the equation.

Given equation is,

y=4x+3
See all solutions

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