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Chapter 4: Q. 19 (page 192)

Answer true or false to the following statement, and explain your answer: A strong correlation between two variables doesn't necess喔lly mean that they"re causally related.

Short Answer

Expert verified

The given statement is true.

Step by step solution

01

Given Information

Given in the question that, a strong correlation between two variables doesn't necess喔lly mean that they"re causally related.

To find Whether the given statement is either true or false.

02

Explanation

Consider the following statement: "A substantial correlation between two variables does not imply that they are causally related."

The stated assertion is correct.

The two variables are said to be tightly connected when the correlation coefficient is larger than0.7.

As a result, a large correlation between two variables does not necessarily imply that they are related.

are tangentially linked"

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Most popular questions from this chapter

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.

Theyintercept of a line has no effect on the steepness of the line.

A value of rclose to -----suggests at most a weak linear relationship between the variables.
Regarding linear equations with one independent variable, answer the following questions:
a. What is the general form of such an equation?
b. In your expression in part (a), which letters represent constants and which represent variables?
c. In your expression in part (a), which letter represents the independent variable and which represents the dependent variable?

Movie Grosses. Box Office Mojo collects and posts data on movie grosses. For a random sample of 50 movies, we obtained both the domestic (U.S.) and overseas grosses, in millions of dollars. The data are presented on the Weiss Stats site.

a. Obtain a scatterplot for the data.

b. Decide whether finding a regression line for the data is reasonable. If so, then also do parts (c)-(f).
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