Question 1

The regression model   is:

Accepted Answer

A) a probabilistic model 
B) a nonlinear model 
C) an exact relationship 
D) a deterministic model 
A) a probabilistic model 
B) a nonlinear model 
C) an exact relationship 
D) a deterministic model

Question 2

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.
 
-Suppose we have information on the monthly incomes and the monthly rents paid by a sample of families.In the regression of monthly rent paid on the monthly income for these data,the value of b will represent:

Accepted Answer

A) the point where this regression line will intersect the y-axis 
B) the point where this regression line will intersect the x-axis 
C) an increase in the monthly rent paid by a family due to a $100 increase in income 
D) an increase in the income of a family due to a $100 increase in the monthly rent 
A) the point where this regression line will intersect the y-axis 
B) the point where this regression line will intersect the x-axis 
C) an increase in the monthly rent paid by a family due to a $100 increase in income 
D) an increase in the income of a family due to a $100 increase in the monthly rent

Question 3

Use the following to answer questions :
For a sample of 22 values of x and y,   746,   254,and b = 1.36.
-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 :
For...

Question 4

Given that   = 241,   = 326,and   = -71,what is the value of the correlation coefficient,rounded to three decimal places?

Accepted Answer

The answer of Given that   = 241, ...

Question 5

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 value of the test statistic,t,rounded to three decimal places?

Accepted Answer

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

Question 6

Use the following to answer questions :
The table shown below gives six pairs of x and y values.
  
-The standard deviation of errors 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 7

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 8

A linear regression:

Accepted Answer

A) gives a relationship between two variables that can be described by a line 
B) gives a relationship between two variables that cannot be described by a line 
C) gives a relationship between three variables that can be described by a line 
D) contains only two variables 
A) gives a relationship between two variables that can be described by a line 
B) gives a relationship between two variables that cannot be described by a line 
C) gives a relationship between three variables that can be described by a line 
D) contains only two variables

Question 9

The value of   :

Accepted Answer

A) is always negative 
B) is always non-negative 
C) is always positive 
D) can be negative,zero,or positive 
A) is always negative 
B) is always non-negative 
C) is always positive 
D) can be negative,zero,or positive

Question 10

One way to measure the quality of the regression model is to inspect the value of the:

Accepted Answer

A) constant term 
B) coefficient on x 
C) coefficient of determination 
D) mean of x 
A) constant term 
B) coefficient on x 
C) coefficient of determination 
D) mean of x

Question 11

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 a randomly selected family with a monthly income of $2500,rounded to the nearest penny?

Accepted Answer

Part A: The lower li

Question 12

In the regression model   ,a and b are the:

Accepted Answer

A) estimates of the population parameters A and B 
B) random variables 
C) population parameters 
D) omitted variables 
A) estimates of the population parameters A and B 
B) random variables 
C) population parameters 
D) omitted variables

Question 13

A weak negative 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 negative 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 negative and close to zero 
D) r is close to -1

Question 14

In the equation   ,-17 is the:

Accepted Answer

A) value of y when x is equal to 1 
B) point where the line intersects the x-axis 
C) change in y due to a one-unit change in x 
D) change in x due to a one-unit change in y 
A) value of y when x is equal to 1 
B) point where the line intersects the x-axis 
C) change in y due to a one-unit change in x 
D) change in x due to a one-unit change in y

Question 15

An assumption of the regression model is that the distribution of errors is

Accepted Answer

A) binomial 
B) rectangular 
C) normal 
D) bimodal 
A) binomial 
B) rectangular 
C) normal 
D) bimodal

Question 16

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%.
-The 90% confidence interval for the slope,B,of the population regression line is:

Accepted Answer

Part A: the lower li

Question 17

Use the following to answer questions :
The table shown below gives six pairs of x and y values.
  
-Using the regression of y on x,the predicted value of y for x = 17,rounded to two decimal places,is:

Accepted Answer

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

Question 18

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.
  
-The standard deviation of errors for the regression of monthly rent on monthly income,rounded to three decimal places,is:

Accepted Answer

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

Question 19

A strong negative correlation means:

Accepted Answer

A) the points in a scatter diagram lie on an upward sloping line 
B) the points in a scatter diagram lie on a downward sloping line 
C) r is close to -1 
D) r is close to 1 
A) the points in a scatter diagram lie on an upward sloping line 
B) the points in a scatter diagram lie on a downward sloping line 
C) r is close to -1 
D) r is close to 1

Question 20

A strong positive correlation means:

Accepted Answer

A) the points in a scatter diagram lie on an upward sloping line 
B) the points in a scatter diagram lie on a downward sloping line 
C) r is close to 1 
D) r is close to -1 
A) the points in a scatter diagram lie on an upward sloping line 
B) the points in a scatter diagram lie on a downward sloping line 
C) r is close to 1 
D) r is close to -1

The regression model is:

Use the following to answer questions : For a sample of 22 values of x and y, 746, 254,and b = 1.36. -The coefficient of determination for the regression of y on x,rounded to three decimal places,is:

Given that = 241, = 326,and = -71,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 standard deviation of errors for the regression of y on x,rounded to three decimal places,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. -What is the 90% confidence interval for the average price of all 16-year old homes,rounded to the nearest dollar?

A linear regression:

The value of :

One way to measure the quality of the regression model is to inspect the value of the:

In the regression model ,a and b are the:

A weak negative correlation means:

In the equation ,-17 is the:

An assumption of the regression model is that the distribution of errors is

Use the following to answer questions : The table shown below gives six pairs of x and y values. -Using the regression of y on x,the predicted value of y for x = 17,rounded to two decimal places,is:

A strong negative correlation means:

A strong positive correlation means:

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 regression model is:

Use the following to answer questions : For a sample of 22 values of x and y, 746, 254,and b = 1.36. -The coefficient of determination for the regression of y on x,rounded to three decimal places,is:

Given that = 241, = 326,and = -71,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 standard deviation of errors for the regression of y on x,rounded to three decimal places,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. -What is the 90% confidence interval for the average price of all 16-year old homes,rounded to the nearest dollar?

A linear regression:

The value of :

One way to measure the quality of the regression model is to inspect the value of the:

In the regression model ,a and b are the:

A weak negative correlation means:

In the equation ,-17 is the:

An assumption of the regression model is that the distribution of errors is

Use the following to answer questions : The table shown below gives six pairs of x and y values. -Using the regression of y on x,the predicted value of y for x = 17,rounded to two decimal places,is:

A strong negative correlation means:

A strong positive correlation means:

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