(a)
To write the equation of the regression line.
(a)
Answer to Problem 31E
Explanation of Solution
In the previous question, it is given the researcher wants to find out is the nicotine content of a cigarette related to the “tars”. Thus, a collection of data in milligrams on
And the dependent variable is nicotine. Thus, the regression line will be:
(b)
To estimate the nicotine content of cigarettes with
(b)
Answer to Problem 31E
Explanation of Solution
In the previous question, it is given the researcher wants to find out is the nicotine content of a cigarette related to the “tars”. Thus, a collection of data in milligrams on
And the dependent variable is nicotine. And, the regression line is:
Thus, the nicotine content of cigarettes with
The nicotine will be
(c)
To interpret the meaning of the slope of the regression line in this context.
(c)
Explanation of Solution
In the previous question, it is given the researcher wants to find out is the nicotine content of a cigarette related to the “tars”. Thus, a collection of data in milligrams on
And the dependent variable is nicotine. And, the regression line is:
Thus, the meaning of the slope of the regression line in this context is that predicted nicotine content increases by
(d)
To explain what does the y -intercept mean.
(d)
Answer to Problem 31E
Explanation of Solution
In the previous question, it is given the researcher wants to find out is the nicotine content of a cigarette related to the “tars”. Thus, a collection of data in milligrams on
And the dependent variable is nicotine. And, the regression line is:
Thus the y -intercept means that we had expect a cigarette with no tar to have
(e)
To find out what is the nicotine content.
(e)
Answer to Problem 31E
Explanation of Solution
In the previous question, it is given the researcher wants to find out is the nicotine content of a cigarette related to the “tars”. Thus, a collection of data in milligrams on
And the dependent variable is nicotine. And, the regression line is:
It is given if a new brand of cigarette contains
Chapter 8 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
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