For each of the following pairs of variables, is there likely to be a positive association, a negative association, or no association? Briefly explain your reasoning. Amount of alcohol consumed and performance on a test of coordination, where a high score represents better coordination. Height and grade point average for college students. Weight of a car and average number of miles it can go on a gallon of gas.

Question

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Answer 1

Textbook Question

Chapter 3, Problem 3.1E

For each of the following pairs of variables, is there likely to be a positive association, a negative association, or no association? Briefly explain your reasoning.

Amount of alcohol consumed and performance on a test of coordination, where a high score represents better coordination.

Height and grade point average for college students.

Weight of a car and average number of miles it can go on a gallon of gas.

Expert Solution

To determine

(a)

To explain whether the relationship between amount of alcohol and performance on test is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship.

Explanation of Solution

The relationship between amount of alcohol and performance on test is negative because if a person consumes the alcohol his/her performance will definitely go down on the test. Which means increase in consumption of alcohol implies decrease in the performance on test. Therefore, there is negative association.

Expert Solution

To determine

(b)

To explain whether the relationship between Height and Grade point average is negative or positive or no relationship at all.

Answer to Problem 3.1E

No association

Explanation of Solution

There is no relationship between the height and grade point average because height has no effect on Grade points. Which implies no association between these variables.

Expert Solution

To determine

(c)

To explain whether the relationship between Weight of the car and average no. of miles is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship

Explanation of Solution

There is negative relationship between Weight of the car and average no. of miles because weight decreases the average no. miles driven by a car. As the weight increases the average number of miles decrease. Therefore, there is negative relationship between these variables.

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Answer 2

Textbook Question

Chapter 3, Problem 3.1E

For each of the following pairs of variables, is there likely to be a positive association, a negative association, or no association? Briefly explain your reasoning.

Amount of alcohol consumed and performance on a test of coordination, where a high score represents better coordination.

Height and grade point average for college students.

Weight of a car and average number of miles it can go on a gallon of gas.

Expert Solution

To determine

(a)

To explain whether the relationship between amount of alcohol and performance on test is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship.

Explanation of Solution

The relationship between amount of alcohol and performance on test is negative because if a person consumes the alcohol his/her performance will definitely go down on the test. Which means increase in consumption of alcohol implies decrease in the performance on test. Therefore, there is negative association.

Expert Solution

To determine

(b)

To explain whether the relationship between Height and Grade point average is negative or positive or no relationship at all.

Answer to Problem 3.1E

No association

Explanation of Solution

There is no relationship between the height and grade point average because height has no effect on Grade points. Which implies no association between these variables.

Expert Solution

To determine

(c)

To explain whether the relationship between Weight of the car and average no. of miles is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship

Explanation of Solution

There is negative relationship between Weight of the car and average no. of miles because weight decreases the average no. miles driven by a car. As the weight increases the average number of miles decrease. Therefore, there is negative relationship between these variables.

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Answer 3

Textbook Question

Chapter 3, Problem 3.1E

For each of the following pairs of variables, is there likely to be a positive association, a negative association, or no association? Briefly explain your reasoning.

Amount of alcohol consumed and performance on a test of coordination, where a high score represents better coordination.

Height and grade point average for college students.

Weight of a car and average number of miles it can go on a gallon of gas.

Expert Solution

To determine

(a)

To explain whether the relationship between amount of alcohol and performance on test is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship.

Explanation of Solution

The relationship between amount of alcohol and performance on test is negative because if a person consumes the alcohol his/her performance will definitely go down on the test. Which means increase in consumption of alcohol implies decrease in the performance on test. Therefore, there is negative association.

Expert Solution

To determine

(b)

To explain whether the relationship between Height and Grade point average is negative or positive or no relationship at all.

Answer to Problem 3.1E

No association

Explanation of Solution

There is no relationship between the height and grade point average because height has no effect on Grade points. Which implies no association between these variables.

Expert Solution

To determine

(c)

To explain whether the relationship between Weight of the car and average no. of miles is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship

Explanation of Solution

There is negative relationship between Weight of the car and average no. of miles because weight decreases the average no. miles driven by a car. As the weight increases the average number of miles decrease. Therefore, there is negative relationship between these variables.

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Answer 4

Textbook Question

Chapter 3, Problem 3.1E

For each of the following pairs of variables, is there likely to be a positive association, a negative association, or no association? Briefly explain your reasoning.

Amount of alcohol consumed and performance on a test of coordination, where a high score represents better coordination.

Height and grade point average for college students.

Weight of a car and average number of miles it can go on a gallon of gas.

Expert Solution

To determine

(a)

To explain whether the relationship between amount of alcohol and performance on test is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship.

Explanation of Solution

The relationship between amount of alcohol and performance on test is negative because if a person consumes the alcohol his/her performance will definitely go down on the test. Which means increase in consumption of alcohol implies decrease in the performance on test. Therefore, there is negative association.

Expert Solution

To determine

(b)

To explain whether the relationship between Height and Grade point average is negative or positive or no relationship at all.

Answer to Problem 3.1E

No association

Explanation of Solution

There is no relationship between the height and grade point average because height has no effect on Grade points. Which implies no association between these variables.

Expert Solution

To determine

(c)

To explain whether the relationship between Weight of the car and average no. of miles is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship

Explanation of Solution

There is negative relationship between Weight of the car and average no. of miles because weight decreases the average no. miles driven by a car. As the weight increases the average number of miles decrease. Therefore, there is negative relationship between these variables.

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Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution

To determine

(a)

To explain whether the relationship between amount of alcohol and performance on test is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship.

Explanation of Solution

The relationship between amount of alcohol and performance on test is negative because if a person consumes the alcohol his/her performance will definitely go down on the test. Which means increase in consumption of alcohol implies decrease in the performance on test. Therefore, there is negative association.

Expert Solution

To determine

(b)

To explain whether the relationship between Height and Grade point average is negative or positive or no relationship at all.

Answer to Problem 3.1E

No association

Explanation of Solution

There is no relationship between the height and grade point average because height has no effect on Grade points. Which implies no association between these variables.

Expert Solution

To determine

(c)

To explain whether the relationship between Weight of the car and average no. of miles is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship

Explanation of Solution

There is negative relationship between Weight of the car and average no. of miles because weight decreases the average no. miles driven by a car. As the weight increases the average number of miles decrease. Therefore, there is negative relationship between these variables.

Answer 8

Expert Solution

To determine

(a)

To explain whether the relationship between amount of alcohol and performance on test is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship.

Explanation of Solution

The relationship between amount of alcohol and performance on test is negative because if a person consumes the alcohol his/her performance will definitely go down on the test. Which means increase in consumption of alcohol implies decrease in the performance on test. Therefore, there is negative association.

Answer 9

Expert Solution

Answer 10

Expert Solution

Answer 11

Expert Solution

Answer 12

To determine

(a)

To explain whether the relationship between amount of alcohol and performance on test is negative or positive or no relationship at all.

Answer 13

Answer to Problem 3.1E

Negative relationship.

Answer 14

Explanation of Solution

The relationship between amount of alcohol and performance on test is negative because if a person consumes the alcohol his/her performance will definitely go down on the test. Which means increase in consumption of alcohol implies decrease in the performance on test. Therefore, there is negative association.

Answer 15

Expert Solution

To determine

(b)

To explain whether the relationship between Height and Grade point average is negative or positive or no relationship at all.

Answer to Problem 3.1E

No association

Explanation of Solution

There is no relationship between the height and grade point average because height has no effect on Grade points. Which implies no association between these variables.

Answer 16

Expert Solution

Answer 17

Expert Solution

Answer 18

Expert Solution

Answer 19

To determine

(b)

To explain whether the relationship between Height and Grade point average is negative or positive or no relationship at all.

Answer 20

Answer to Problem 3.1E

No association

Answer 21

Explanation of Solution

There is no relationship between the height and grade point average because height has no effect on Grade points. Which implies no association between these variables.

Answer 22

Expert Solution

To determine

(c)

To explain whether the relationship between Weight of the car and average no. of miles is negative or positive or no relationship at all.

Answer to Problem 3.1E

Negative relationship

Explanation of Solution

There is negative relationship between Weight of the car and average no. of miles because weight decreases the average no. miles driven by a car. As the weight increases the average number of miles decrease. Therefore, there is negative relationship between these variables.

Answer 23

Expert Solution

Answer 24

Expert Solution

Answer 25

Expert Solution

Answer 26

To determine

(c)

To explain whether the relationship between Weight of the car and average no. of miles is negative or positive or no relationship at all.

Answer 27

Answer to Problem 3.1E

Negative relationship

Answer 28

Explanation of Solution

There is negative relationship between Weight of the car and average no. of miles because weight decreases the average no. miles driven by a car. As the weight increases the average number of miles decrease. Therefore, there is negative relationship between these variables.