Question 1

How does an outlier effect the correlation?

Accepted Answer

A)  A single outlier has no effect. 
B)  A single outlier has minimal effect. 
C)  A single outlier can change the value of the correlation, but not its sign. 
D)  A single outlier can change the value and the sign of the correlation. 
A)  A single outlier has no effect. 
B)  A single outlier has minimal effect. 
C)  A single outlier can change the value of the correlation, but not its sign. 
D)  A single outlier can change the value and the sign of the correlation.

Question 2

A data set has $\bar{x}$ = 3, $\bar{y}$ = 10, Sx=1 Sy =3  r = 0.45 . Which of the following point is on the least-squares regression line?

Accepted Answer

A)  (10,3) 
B)  (3,1) 
C)  (1,3) 
D)  (3,10) 
A)  (10,3) 
B)  (3,1) 
C)  (1,3) 
D)  (3,10)

Question 3

Use the table below to answer the following Questions . $\begin{array} { l l l l l l l l l l l } 
\text { Temperature in degrees } F ( y )& 70 & 72 & 74 & 75 & 81 & 82 & 83 & 84 & 89 & 93 \
\text { Chirps per second } ( x ) & 15 & 15 & 15 & 16 & 17 & 17 & 16 & 17 & 19 & 20
\end{array}$
-Let x = number of chirps per second and y = temperature. What is the intercept of the regression line?

Accepted Answer

A)  about 4 
B)  about 11 
C)  about ?11 
D)  about 70 
A)  about 4 
B)  about 11 
C)  about ?11 
D)  about 70

Question 4

The least-squares regression line minimizes the sum of:

Accepted Answer

A)  the squares of the shortest distance from each scatterplot point to the regression line. 
B)  the squares of the vertical distance from each scatterplot point to the regression line. 
C)  the squares of the horizontal distance from each scatterplot point to the regression line. 
D)  None of the above. 
A)  the squares of the shortest distance from each scatterplot point to the regression line. 
B)  the squares of the vertical distance from each scatterplot point to the regression line. 
C)  the squares of the horizontal distance from each scatterplot point to the regression line. 
D)  None of the above.

How does an outlier effect the correlation?

A data set has $\bar{x}$ = 3, $\bar{y}$ = 10, S_x=1 S_y =3 r = 0.45 . Which of the following point is on the least-squares regression line?

Use the table below to answer the following Questions . Temperature in degrees F(y) 70 72 74 75 81 82 83 84 89 93 Chirps per second (x) 15 15 15 16 17 17 16 17 19 20 -Let x = number of chirps per second and y = temperature. What is the intercept of the regression line?

The least-squares regression line minimizes the sum of:

Urban Services

Business Efficiency

Planning and Scheduling

Linear Programming

Exploring Data: Distributions

Data for Decisions

Probability: the Mathematics of Chance

Social Choice: the Impossible Dream

The Manipulability of Voting Systems

Weighted Voting Systems

Electing the President

Fair Division

Apportionment

Game Theory: the Mathematics of Competition

Identification Numbers

Information Science

Growth and Form

Symmetry and Patterns

Tilings

Savings Models

Borrowing Models

The Economics of Resources

Filters

Exam 6: Exploring Data: Relationships

How does an outlier effect the correlation?

A data set has xˉ\bar{x}xˉ = 3, yˉ\bar{y}yˉ​ = 10, Sx=1 Sy =3 r = 0.45 . Which of the following point is on the least-squares regression line?

Use the table below to answer the following Questions . Temperature in degrees F(y) 70 72 74 75 81 82 83 84 89 93 Chirps per second (x) 15 15 15 16 17 17 16 17 19 20 -Let x = number of chirps per second and y = temperature. What is the intercept of the regression line?

The least-squares regression line minimizes the sum of:

Urban Services

Business Efficiency

Planning and Scheduling

Linear Programming

Exploring Data: Distributions

Data for Decisions

Probability: the Mathematics of Chance

Social Choice: the Impossible Dream

The Manipulability of Voting Systems

Weighted Voting Systems

Electing the President

Fair Division

Apportionment

Game Theory: the Mathematics of Competition

Identification Numbers

Information Science

Growth and Form

Symmetry and Patterns

Tilings

Savings Models

Borrowing Models

The Economics of Resources

Filters

A data set has $\bar{x}$ = 3, $\bar{y}$ = 10, S_x=1 S_y =3 r = 0.45 . Which of the following point is on the least-squares regression line?