Question 1

The value of y obtained for an element from a survey is the:

Accepted Answer

A) predicted value of y 
B) estimated value of y 
C) actual value of y 
D) residual 
A) predicted value of y 
B) estimated value of y 
C) actual value of y 
D) residual

Question 2

Given that   = 276,   = 183,and   = 153,what is the value of the correlation coefficient,rounded to three decimal places?

Accepted Answer

The answer of Given that   = 276, ...

Question 3

Use the following to answer questions :
The table shown below gives six pairs of x and y values.
  
-The coefficient of determination for the regression of y on x,rounded to three decimal places,is:

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 4

The value of the correlation coefficient is always:

Accepted Answer

A) in the range 0 to 1 
B) less than zero 
C) in the range -1 to 1 
D) greater than zero 
A) in the range 0 to 1 
B) less than zero 
C) in the range -1 to 1 
D) greater than zero

Question 5

Use the following to answer questions :
The following table lists the ages (in years)and the prices (in thousands of dollars)by a sample of six houses.
  
-What is the 90% confidence interval for the average price of all 16-year old homes,rounded to the nearest dollar?

Accepted Answer

Part A: The lower li

Question 6

The least squares method minimizes the:

Accepted Answer

A) difference between the y and x values 
B) sum of the errors 
C) sum of the squares of errors 
D) sum of the y values 
A) difference between the y and x values 
B) sum of the errors 
C) sum of the squares of errors 
D) sum of the y values

Question 7

The total sum of squares (SST)is always equal to the:

Accepted Answer

A) regression sum of squares plus the error sum of squares 
B) regression sum of squares minus the error sum of squares 
C) error sum of squares minus the regression sum of squares 
D) regression sum of squares divided by the error sum of squares 
A) regression sum of squares plus the error sum of squares 
B) regression sum of squares minus the error sum of squares 
C) error sum of squares minus the regression sum of squares 
D) regression sum of squares divided by the error sum of squares

Question 8

A weak positive correlation means:

Accepted Answer

A) the points in a scatter diagram are very close to an upward sloping line 
B) the points in a scatter diagram are very close to a downward sloping line 
C) r is positive and close to zero 
D) r is close to 1 
A) the points in a scatter diagram are very close to an upward sloping line 
B) the points in a scatter diagram are very close to a downward sloping line 
C) r is positive and close to zero 
D) r is close to 1

Question 9

Use the following to answer questions :
The table shown below gives six pairs of x and y values.
  
-The values of   and   ,rounded to three decimal places,are:

Accepted Answer

Part A: @#IMG-DLM& =

Question 10

In the regression model   ,A and B are the:

Accepted Answer

A) sample statistics 
B) random variables 
C) population parameters 
D) omitted variables 
A) sample statistics 
B) random variables 
C) population parameters 
D) omitted variables

Question 11

In the regression model   ,a and b are the:

Accepted Answer

A) sample statistics 
B) random variables 
C) population parameters 
D) omitted variables 
A) sample statistics 
B) random variables 
C) population parameters 
D) omitted variables

Question 12

In the regression model   ,y is the:

Accepted Answer

A) dependent variable 
B) independent variable 
C) error term 
D) missing variable 
A) dependent variable 
B) independent variable 
C) error term 
D) missing variable

Question 13

Use the following to answer questions :
For a data set of 10 values of x and y,the value of   = 86,the standard deviation of errors for the regression of y on x is 3.662,and the value of b is 3.00.
For the purpose of running a hypothesis test,the null hypothesis is that the slope of the population regression line of y on x is zero and the alternative hypothesis is that the slope of this population regression line is different from zero.The significance level is 5%.
-What is the value of the test statistic,t,rounded to three decimal places?

Accepted Answer

The answer of Use the following to answer questions :
For...

Question 14

Use the following to answer questions :
The following table lists the monthly incomes (in hundreds of dollars)and the monthly rents paid (in hundreds of dollars)by a sample of six families.
  
-What is the 99% confidence interval for the mean monthly rent of all families with a monthly income of $2500,rounded to the nearest penny?

Accepted Answer

Part A: The lower li

Question 15

Use the following to answer questions :
For a data set of 15 values of x and y,the value of   = 313,the standard deviation of errors for the regression of y on x is 8.347,and the value of b is 1.78.
For the purpose of running a hypothesis test,the null hypothesis is that the slope of the population regression line of y on x is zero and the alternative hypothesis is that the slope of this population regression line is greater than zero.The significance level is 5%.
-What is the critical value of t?

Accepted Answer

A) 1.753 
B) 1.751 
C) 1.771 
D) 2.131 
A) 1.753 
B) 1.751 
C) 1.771 
D) 2.131

Question 16

Use the following to answer questions :
The table shown below gives seven pairs of x and y values.
  
-The values of   and   ,rounded to three decimal places,are:

Accepted Answer

Part A: @#IMG-DLM& =

Question 17

Use the following to answer questions :
The following table lists the ages (in years)and the prices (in thousands of dollars)by a sample of six houses.
  
-The 95% confidence interval for the slope,B,of the population regression line of price on age is:

Accepted Answer

Part A: the lower li

Question 18

Use the following to answer questions :
The following table lists the ages (in years)and the prices (in thousands of dollars)by a sample of six houses.
  
-Using the regression of house value on age,the predicted value of a house that 16 years old,rounded to the nearest dollar,is:

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 19

An assumption of the regression model is that the random error term has a mean equal to:

Accepted Answer

A) zero for each x 
B) one for each x 
C) the value of each x 
D) zero for each y 
A) zero for each x 
B) one for each x 
C) the value of each x 
D) zero for each y

Question 20

The coefficient of determination is equal to the:

Accepted Answer

A) total sum of squares divided by the regression sum of squares 
B) error sum of squares divided by the regression sum of squares 
C) regression sum of squares divided by the total sum of squares 
D) error sum of squares divided by the total sum of squares 
A) total sum of squares divided by the regression sum of squares 
B) error sum of squares divided by the regression sum of squares 
C) regression sum of squares divided by the total sum of squares 
D) error sum of squares divided by the total sum of squares

The value of y obtained for an element from a survey is the:

Given that = 276, = 183,and = 153,what is the value of the correlation coefficient,rounded to three decimal places?

Use the following to answer questions : The table shown below gives six pairs of x and y values. -The coefficient of determination for the regression of y on x,rounded to three decimal places,is:

The value of the correlation coefficient is always:

Use the following to answer questions : The following table lists the ages (in years)and the prices (in thousands of dollars)by a sample of six houses. -What is the 90% confidence interval for the average price of all 16-year old homes,rounded to the nearest dollar?

The least squares method minimizes the:

The total sum of squares (SST)is always equal to the:

A weak positive correlation means:

Use the following to answer questions : The table shown below gives six pairs of x and y values. -The values of and ,rounded to three decimal places,are:

In the regression model ,A and B are the:

In the regression model ,a and b are the:

In the regression model ,y is the:

Use the following to answer questions : The table shown below gives seven pairs of x and y values. -The values of and ,rounded to three decimal places,are:

Use the following to answer questions : The following table lists the ages (in years)and the prices (in thousands of dollars)by a sample of six houses. -The 95% confidence interval for the slope,B,of the population regression line of price on age is:

Use the following to answer questions : The following table lists the ages (in years)and the prices (in thousands of dollars)by a sample of six houses. -Using the regression of house value on age,the predicted value of a house that 16 years old,rounded to the nearest dollar,is:

An assumption of the regression model is that the random error term has a mean equal to:

The coefficient of determination is equal to the:

Introduction

Organizing and Graphing Data

Numerical Descriptive Measures

Probability

Discrete Random Variables and Their Probability Distribution

Continuous Random Variables and the Normal Distribution

Sampling Distributions

Estimation of the Mean and Proportion

Hypothesis Tests About the Mean and Proportion

Estimation and Hypothesis Testing: Two Populations

Chi-Square Tests

Analysis of Variance

Filters

Exam 13: Simple Linear Regression

The value of y obtained for an element from a survey is the:

Given that = 276, = 183,and = 153,what is the value of the correlation coefficient,rounded to three decimal places?

Use the following to answer questions : The table shown below gives six pairs of x and y values. -The coefficient of determination for the regression of y on x,rounded to three decimal places,is:

The value of the correlation coefficient is always:

Use the following to answer questions : The following table lists the ages (in years)and the prices (in thousands of dollars)by a sample of six houses. -What is the 90% confidence interval for the average price of all 16-year old homes,rounded to the nearest dollar?

The least squares method minimizes the:

The total sum of squares (SST)is always equal to the:

A weak positive correlation means:

Use the following to answer questions : The table shown below gives six pairs of x and y values. -The values of and ,rounded to three decimal places,are:

In the regression model ,A and B are the:

In the regression model ,a and b are the:

In the regression model ,y is the:

Use the following to answer questions : The table shown below gives seven pairs of x and y values. -The values of and ,rounded to three decimal places,are:

Use the following to answer questions : The following table lists the ages (in years)and the prices (in thousands of dollars)by a sample of six houses. -The 95% confidence interval for the slope,B,of the population regression line of price on age is:

Use the following to answer questions : The following table lists the ages (in years)and the prices (in thousands of dollars)by a sample of six houses. -Using the regression of house value on age,the predicted value of a house that 16 years old,rounded to the nearest dollar,is:

An assumption of the regression model is that the random error term has a mean equal to:

The coefficient of determination is equal to the:

Introduction

Organizing and Graphing Data

Numerical Descriptive Measures

Probability

Discrete Random Variables and Their Probability Distribution

Continuous Random Variables and the Normal Distribution

Sampling Distributions

Estimation of the Mean and Proportion

Hypothesis Tests About the Mean and Proportion

Estimation and Hypothesis Testing: Two Populations

Chi-Square Tests

Analysis of Variance

Filters