True or false If false, explain briefly. a) We choose the linear model that passes through the most data points on the scatterplot . b) The residuals are the observed y-values minus the y-values predicted by the linear model. c) Least squares means that the square of the largest residual is as small as it could possibly be.

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 7, Problem 1E

True or false If false, explain briefly.

a) We choose the linear model that passes through the most data points on the scatterplot.
b) The residuals are the observed y-values minus the y-values predicted by the linear model.
c) Least squares means that the square of the largest residual is as small as it could possibly be.

a.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

The linear model, which passes through the most data points on the scatterplot, are chosen.

Justification:

If the line passes through the most data points on the then that line won’t be straight line. The line touches some of the points or none of the points, but it minimize the sum of least squares.

Thus, the given statement is false.

Statistics Concept Introduction

The conditions for a scatterplot that is well fitted for the data are,

Straight Enough Condition: The relationship between y and x straight enough to proceed with a linear regression model.
Outlier Condition: No outlier must be there which influences the fit of the least square line.
Thickness Condition: The spread of the data around the generally straight relationship seem to be consistent for all values of predictor variable.

b.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is true.

Explanation of Solution

Given info:

The residuals are the observed y-values minus the predicted y-values by the linear model.

Justification:

The residual gives the difference between the observed value of the response variable and that of the predicted value.

Thus, the given statement is true.

Statistics Concept Introduction

Residual:

The residual is defined as Residual = Observed value − Predicted value or e=y−y^ where y^ be the predicted value of the response variable and y be the actual value of the response variable.

c.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

Least square defines the square of the largest residual is as small as it could possibly be.

Justification:

A least square criterion defines the unique line that minimize the variance of residuals or sum of squared of the residuals. It does not imply to minimize the largest residual is as small as it could possibly be.

Thus, the given statement is false.

Statistics Concept Introduction

Least-square criterion:

The least-square criterion is of a regression line that the best fits of a set of data points having the smallest possible sum of squares.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

Suppose that you want to estimate the mean monthly gross income of all households in your local community. You decide to estimate this population parameter by calling 150 randomly selected residents and asking each individual to report the household’s monthly income. Assume that you use the local phone directory as the frame in selecting the households to be included in your sample. What are some possible sources of error that might arise in your effort to estimate the population mean?

For the distribution shown, match the letter to the measure of central tendency. A B C C Drag each of the letters into the appropriate measure of central tendency. Mean C Median A Mode B

A physician who has a group of 38 female patients aged 18 to 24 on a special diet wishes to estimate the effect of the diet on total serum cholesterol. For this group, their average serum cholesterol is 188.4 (measured in mg/100mL). Suppose that the total serum cholesterol measurements are normally distributed with standard deviation of 40.7. (a) Find a 95% confidence interval of the mean serum cholesterol of patients on the special diet.

Answer 2

Textbook Question

Chapter 7, Problem 1E

True or false If false, explain briefly.

a) We choose the linear model that passes through the most data points on the scatterplot.
b) The residuals are the observed y-values minus the y-values predicted by the linear model.
c) Least squares means that the square of the largest residual is as small as it could possibly be.

a.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

The linear model, which passes through the most data points on the scatterplot, are chosen.

Justification:

If the line passes through the most data points on the then that line won’t be straight line. The line touches some of the points or none of the points, but it minimize the sum of least squares.

Thus, the given statement is false.

Statistics Concept Introduction

The conditions for a scatterplot that is well fitted for the data are,

Straight Enough Condition: The relationship between y and x straight enough to proceed with a linear regression model.
Outlier Condition: No outlier must be there which influences the fit of the least square line.
Thickness Condition: The spread of the data around the generally straight relationship seem to be consistent for all values of predictor variable.

b.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is true.

Explanation of Solution

Given info:

The residuals are the observed y-values minus the predicted y-values by the linear model.

Justification:

The residual gives the difference between the observed value of the response variable and that of the predicted value.

Thus, the given statement is true.

Statistics Concept Introduction

Residual:

The residual is defined as Residual = Observed value − Predicted value or e=y−y^ where y^ be the predicted value of the response variable and y be the actual value of the response variable.

c.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

Least square defines the square of the largest residual is as small as it could possibly be.

Justification:

A least square criterion defines the unique line that minimize the variance of residuals or sum of squared of the residuals. It does not imply to minimize the largest residual is as small as it could possibly be.

Thus, the given statement is false.

Statistics Concept Introduction

Least-square criterion:

The least-square criterion is of a regression line that the best fits of a set of data points having the smallest possible sum of squares.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 7, Problem 1E

True or false If false, explain briefly.

a) We choose the linear model that passes through the most data points on the scatterplot.
b) The residuals are the observed y-values minus the y-values predicted by the linear model.
c) Least squares means that the square of the largest residual is as small as it could possibly be.

a.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

The linear model, which passes through the most data points on the scatterplot, are chosen.

Justification:

If the line passes through the most data points on the then that line won’t be straight line. The line touches some of the points or none of the points, but it minimize the sum of least squares.

Thus, the given statement is false.

Statistics Concept Introduction

The conditions for a scatterplot that is well fitted for the data are,

Straight Enough Condition: The relationship between y and x straight enough to proceed with a linear regression model.
Outlier Condition: No outlier must be there which influences the fit of the least square line.
Thickness Condition: The spread of the data around the generally straight relationship seem to be consistent for all values of predictor variable.

b.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is true.

Explanation of Solution

Given info:

The residuals are the observed y-values minus the predicted y-values by the linear model.

Justification:

The residual gives the difference between the observed value of the response variable and that of the predicted value.

Thus, the given statement is true.

Statistics Concept Introduction

Residual:

The residual is defined as Residual = Observed value − Predicted value or e=y−y^ where y^ be the predicted value of the response variable and y be the actual value of the response variable.

c.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

Least square defines the square of the largest residual is as small as it could possibly be.

Justification:

A least square criterion defines the unique line that minimize the variance of residuals or sum of squared of the residuals. It does not imply to minimize the largest residual is as small as it could possibly be.

Thus, the given statement is false.

Statistics Concept Introduction

Least-square criterion:

The least-square criterion is of a regression line that the best fits of a set of data points having the smallest possible sum of squares.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 7, Problem 1E

True or false If false, explain briefly.

a) We choose the linear model that passes through the most data points on the scatterplot.
b) The residuals are the observed y-values minus the y-values predicted by the linear model.
c) Least squares means that the square of the largest residual is as small as it could possibly be.

a.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

The linear model, which passes through the most data points on the scatterplot, are chosen.

Justification:

If the line passes through the most data points on the then that line won’t be straight line. The line touches some of the points or none of the points, but it minimize the sum of least squares.

Thus, the given statement is false.

Statistics Concept Introduction

The conditions for a scatterplot that is well fitted for the data are,

Straight Enough Condition: The relationship between y and x straight enough to proceed with a linear regression model.
Outlier Condition: No outlier must be there which influences the fit of the least square line.
Thickness Condition: The spread of the data around the generally straight relationship seem to be consistent for all values of predictor variable.

b.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is true.

Explanation of Solution

Given info:

The residuals are the observed y-values minus the predicted y-values by the linear model.

Justification:

The residual gives the difference between the observed value of the response variable and that of the predicted value.

Thus, the given statement is true.

Statistics Concept Introduction

Residual:

The residual is defined as Residual = Observed value − Predicted value or e=y−y^ where y^ be the predicted value of the response variable and y be the actual value of the response variable.

c.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

Least square defines the square of the largest residual is as small as it could possibly be.

Justification:

A least square criterion defines the unique line that minimize the variance of residuals or sum of squared of the residuals. It does not imply to minimize the largest residual is as small as it could possibly be.

Thus, the given statement is false.

Statistics Concept Introduction

Least-square criterion:

The least-square criterion is of a regression line that the best fits of a set of data points having the smallest possible sum of squares.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

a.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

The linear model, which passes through the most data points on the scatterplot, are chosen.

Justification:

If the line passes through the most data points on the then that line won’t be straight line. The line touches some of the points or none of the points, but it minimize the sum of least squares.

Thus, the given statement is false.

Statistics Concept Introduction

The conditions for a scatterplot that is well fitted for the data are,

Straight Enough Condition: The relationship between y and x straight enough to proceed with a linear regression model.
Outlier Condition: No outlier must be there which influences the fit of the least square line.
Thickness Condition: The spread of the data around the generally straight relationship seem to be consistent for all values of predictor variable.

b.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is true.

Explanation of Solution

Given info:

The residuals are the observed y-values minus the predicted y-values by the linear model.

Justification:

The residual gives the difference between the observed value of the response variable and that of the predicted value.

Thus, the given statement is true.

Statistics Concept Introduction

Residual:

The residual is defined as Residual = Observed value − Predicted value or e=y−y^ where y^ be the predicted value of the response variable and y be the actual value of the response variable.

c.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

Least square defines the square of the largest residual is as small as it could possibly be.

Justification:

A least square criterion defines the unique line that minimize the variance of residuals or sum of squared of the residuals. It does not imply to minimize the largest residual is as small as it could possibly be.

Thus, the given statement is false.

Statistics Concept Introduction

Least-square criterion:

The least-square criterion is of a regression line that the best fits of a set of data points having the smallest possible sum of squares.

Answer 8

a.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

The linear model, which passes through the most data points on the scatterplot, are chosen.

Justification:

If the line passes through the most data points on the then that line won’t be straight line. The line touches some of the points or none of the points, but it minimize the sum of least squares.

Thus, the given statement is false.

Statistics Concept Introduction

The conditions for a scatterplot that is well fitted for the data are,

Straight Enough Condition: The relationship between y and x straight enough to proceed with a linear regression model.
Outlier Condition: No outlier must be there which influences the fit of the least square line.
Thickness Condition: The spread of the data around the generally straight relationship seem to be consistent for all values of predictor variable.

Answer 9

a.

Expert Solution

Answer 10

a.

Expert Solution

Answer 11

Expert Solution

Answer 12

To determine

Find whether the given statement is true or false.

Answer 13

Answer to Problem 1E

The given statement is false.

Answer 14

Explanation of Solution

Given info:

The linear model, which passes through the most data points on the scatterplot, are chosen.

Justification:

If the line passes through the most data points on the then that line won’t be straight line. The line touches some of the points or none of the points, but it minimize the sum of least squares.

Thus, the given statement is false.

Answer 15

Statistics Concept Introduction

The conditions for a scatterplot that is well fitted for the data are,

Straight Enough Condition: The relationship between y and x straight enough to proceed with a linear regression model.
Outlier Condition: No outlier must be there which influences the fit of the least square line.
Thickness Condition: The spread of the data around the generally straight relationship seem to be consistent for all values of predictor variable.

Answer 16

b.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is true.

Explanation of Solution

Given info:

The residuals are the observed y-values minus the predicted y-values by the linear model.

Justification:

The residual gives the difference between the observed value of the response variable and that of the predicted value.

Thus, the given statement is true.

Statistics Concept Introduction

Residual:

The residual is defined as Residual = Observed value − Predicted value or e=y−y^ where y^ be the predicted value of the response variable and y be the actual value of the response variable.

Answer 17

b.

Expert Solution

Answer 18

b.

Expert Solution

Answer 19

Expert Solution

Answer 20

To determine

Find whether the given statement is true or false.

Answer 21

Answer to Problem 1E

The given statement is true.

Answer 22

Explanation of Solution

Given info:

The residuals are the observed y-values minus the predicted y-values by the linear model.

Justification:

The residual gives the difference between the observed value of the response variable and that of the predicted value.

Thus, the given statement is true.

Answer 23

Statistics Concept Introduction

Residual:

The residual is defined as Residual = Observed value − Predicted value or e=y−y^ where y^ be the predicted value of the response variable and y be the actual value of the response variable.

Answer 24

c.

Expert Solution

To determine

Find whether the given statement is true or false.

Answer to Problem 1E

The given statement is false.

Explanation of Solution

Given info:

Least square defines the square of the largest residual is as small as it could possibly be.

Justification:

A least square criterion defines the unique line that minimize the variance of residuals or sum of squared of the residuals. It does not imply to minimize the largest residual is as small as it could possibly be.

Thus, the given statement is false.

Statistics Concept Introduction

Least-square criterion:

The least-square criterion is of a regression line that the best fits of a set of data points having the smallest possible sum of squares.

Answer 25

c.

Expert Solution

Answer 26

c.

Expert Solution

Answer 27

Expert Solution

Answer 28

To determine

Find whether the given statement is true or false.

Answer 29

Answer to Problem 1E

The given statement is false.

Answer 30

Explanation of Solution

Given info:

Least square defines the square of the largest residual is as small as it could possibly be.

Justification:

A least square criterion defines the unique line that minimize the variance of residuals or sum of squared of the residuals. It does not imply to minimize the largest residual is as small as it could possibly be.

Thus, the given statement is false.