Concept explainers
(a)
To explain what the value of
(a)

Explanation of Solution
It is given in the question the table in which the values are calculated. Thus, from table we have,
The value of
From this, we interpret that
(b)
To find the
(b)

Answer to Problem 36E
The mean mileage is
Explanation of Solution
As we know that the least square regression line is as:
With
The constant
The slope
Then the least square equation then becomes:
With
The point
Thus, the mean mileage is
(c)
To interpret the value of
(c)

Answer to Problem 36E
The error made when predicting the mileage using the least square regression line is on average
Explanation of Solution
In the question it is given the table of calculated values.
Thus, from that it is given the value of
Thus, from this we interpret that the error made when predicting the mileage using the least square regression line is on average
(d)
To explain would it be reasonable to use the least square line to predict a car’s mileage from its age for a Council high school teacher.
(d)

Explanation of Solution
It is not be reasonable to use the least square line to predict a car’s mileage from its age for a Council high school teacher because the least-squares line was determined using data of students. The data of students is not representative for the teachers and thus we cannot use the least-squares line to predict the mileage of cars of teachers.
Chapter 10 Solutions
PRACTICE OF STATISTICS F/AP EXAM
Additional Math Textbook Solutions
University Calculus: Early Transcendentals (4th Edition)
College Algebra (7th Edition)
Elementary Statistics (13th Edition)
A First Course in Probability (10th Edition)
Calculus: Early Transcendentals (2nd Edition)
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